diff --git a/samples/subsys/ipc/ipc_service/icmsg/CMakeLists.txt b/samples/subsys/ipc/ipc_service/icmsg/CMakeLists.txt
index 7fdf33f9621e..ea36b8c5038a 100644
--- a/samples/subsys/ipc/ipc_service/icmsg/CMakeLists.txt
+++ b/samples/subsys/ipc/ipc_service/icmsg/CMakeLists.txt
@@ -10,6 +10,7 @@ find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 
 if(NOT CONFIG_BOARD_NRF5340DK_NRF5340_CPUAPP AND
     NOT CONFIG_BOARD_NRF5340BSIM_NRF5340_CPUAPP AND
+    NOT CONFIG_BOARD_NRF54LM20DK_NRF54LM20A_CPUAPP AND
     NOT CONFIG_BOARD_STM32H747I_DISCO AND
     NOT CONFIG_BOARD_NRF54L15DK_NRF54L15_CPUAPP)
   message(FATAL_ERROR "${BOARD} is not supported for this sample")
diff --git a/samples/subsys/ipc/ipc_service/icmsg/Kconfig.sysbuild b/samples/subsys/ipc/ipc_service/icmsg/Kconfig.sysbuild
index 8ef1b70793b8..4034b1dcc1cb 100644
--- a/samples/subsys/ipc/ipc_service/icmsg/Kconfig.sysbuild
+++ b/samples/subsys/ipc/ipc_service/icmsg/Kconfig.sysbuild
@@ -9,4 +9,5 @@ string
 	default "nrf5340dk/nrf5340/cpunet" if $(BOARD) = "nrf5340dk"
 	default "nrf5340bsim/nrf5340/cpunet" if $(BOARD) = "nrf5340bsim"
 	default "nrf54l15dk/nrf54l15/cpuflpr" if $(BOARD) = "nrf54l15dk"
+	default "nrf54lm20dk/nrf54lm20a/cpuflpr" if $(BOARD) = "nrf54lm20dk"
 	default "stm32h747i_disco/stm32h747xx/m4" if $(BOARD) = "stm32h747i_disco"
diff --git a/samples/subsys/ipc/ipc_service/icmsg/boards/nrf54l_cpuapp_icbmsg.overlay b/samples/subsys/ipc/ipc_service/icmsg/boards/nrf54l_cpuapp_icbmsg.overlay
new file mode 100644
index 000000000000..e313e3d89158
--- /dev/null
+++ b/samples/subsys/ipc/ipc_service/icmsg/boards/nrf54l_cpuapp_icbmsg.overlay
@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&ipc0 {
+	compatible = "zephyr,ipc-icbmsg";
+	tx-blocks = <16>;
+	rx-blocks = <18>;
+	status = "okay";
+};
diff --git a/samples/subsys/ipc/ipc_service/icmsg/boards/nrf54l15dk_nrf54l15_cpuapp_icbmsg.overlay b/samples/subsys/ipc/ipc_service/icmsg/boards/nrf54lm20dk_nrf54lm20a_cpuapp.overlay
similarity index 64%
rename from samples/subsys/ipc/ipc_service/icmsg/boards/nrf54l15dk_nrf54l15_cpuapp_icbmsg.overlay
rename to samples/subsys/ipc/ipc_service/icmsg/boards/nrf54lm20dk_nrf54lm20a_cpuapp.overlay
index 639ad5e844b4..33afb300d789 100644
--- a/samples/subsys/ipc/ipc_service/icmsg/boards/nrf54l15dk_nrf54l15_cpuapp_icbmsg.overlay
+++ b/samples/subsys/ipc/ipc_service/icmsg/boards/nrf54lm20dk_nrf54lm20a_cpuapp.overlay
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024 Nordic Semiconductor ASA
+ * Copyright (c) 2025 Nordic Semiconductor ASA
  *
  * SPDX-License-Identifier: Apache-2.0
  */
@@ -10,24 +10,22 @@
 			#address-cells = <1>;
 			#size-cells = <1>;
 
-			sram_rx: memory@20018000 {
-				reg = <0x20018000 0x0800>;
+			sram_rx: memory@20057c00 {
+				reg = <0x20057c00 0x8000>;
 			};
 
-			sram_tx: memory@20020000 {
-				reg = <0x20020000 0x0800>;
+			sram_tx: memory@2005fc00 {
+				reg = <0x2005fc00 0x8000>;
 			};
 		};
 	};
 
 	ipc {
 		ipc0: ipc0 {
-			compatible = "zephyr,ipc-icbmsg";
+			compatible = "zephyr,ipc-icmsg";
 			dcache-alignment = <32>;
 			tx-region = <&sram_tx>;
 			rx-region = <&sram_rx>;
-			tx-blocks = <16>;
-			rx-blocks = <18>;
 			mboxes = <&cpuapp_vevif_rx 20>, <&cpuapp_vevif_tx 21>;
 			mbox-names = "rx", "tx";
 			status = "okay";
diff --git a/samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54l_cpuflpr_icbmsg.overlay b/samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54l_cpuflpr_icbmsg.overlay
new file mode 100644
index 000000000000..2f0fe1121a8b
--- /dev/null
+++ b/samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54l_cpuflpr_icbmsg.overlay
@@ -0,0 +1,12 @@
+/*
+ * Copyright (c) 2024 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+&ipc0 {
+	compatible = "zephyr,ipc-icbmsg";
+	tx-blocks = <18>;
+	rx-blocks = <16>;
+	status = "okay";
+};
diff --git a/samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54l15dk_nrf54l15_cpuflpr_icbmsg.overlay b/samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54lm20dk_nrf54lm20a_cpuflpr.overlay
similarity index 73%
rename from samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54l15dk_nrf54l15_cpuflpr_icbmsg.overlay
rename to samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54lm20dk_nrf54lm20a_cpuflpr.overlay
index 7fe78a716539..c70b113b5968 100644
--- a/samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54l15dk_nrf54l15_cpuflpr_icbmsg.overlay
+++ b/samples/subsys/ipc/ipc_service/icmsg/remote/boards/nrf54lm20dk_nrf54lm20a_cpuflpr.overlay
@@ -10,24 +10,22 @@
 			#address-cells = <1>;
 			#size-cells = <1>;
 
-			sram_tx: memory@20018000 {
-				reg = <0x20018000 0x0800>;
+			sram_tx: memory@20057c00 {
+				reg = <0x20057c00 0x8000>;
 			};
 
-			sram_rx: memory@20020000 {
-				reg = <0x20020000 0x0800>;
+			sram_rx: memory@2005fc00 {
+				reg = <0x2005fc00 0x8000>;
 			};
 		};
 	};
 
 	ipc {
 		ipc0: ipc0 {
-			compatible = "zephyr,ipc-icbmsg";
+			compatible = "zephyr,ipc-icmsg";
 			dcache-alignment = <32>;
 			tx-region = <&sram_tx>;
 			rx-region = <&sram_rx>;
-			tx-blocks = <18>;
-			rx-blocks = <16>;
 			mboxes = <&cpuflpr_vevif_rx 21>, <&cpuflpr_vevif_tx 20>;
 			mbox-names = "rx", "tx";
 			status = "okay";
diff --git a/samples/subsys/ipc/ipc_service/icmsg/sample.yaml b/samples/subsys/ipc/ipc_service/icmsg/sample.yaml
index fae6b067b39a..278e65d02729 100644
--- a/samples/subsys/ipc/ipc_service/icmsg/sample.yaml
+++ b/samples/subsys/ipc/ipc_service/icmsg/sample.yaml
@@ -24,8 +24,10 @@ tests:
         - "host: Received"
         - "host: IPC-service HOST demo ended"
 
-  sample.ipc.icmsg.nrf54l15:
-    platform_allow: nrf54l15dk/nrf54l15/cpuapp
+  sample.ipc.icmsg.nrf54l:
+    platform_allow:
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54lm20dk/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf54l15dk/nrf54l15/cpuapp
     tags: ipc
@@ -43,8 +45,10 @@ tests:
         - "host: Received"
         - "host: IPC-service HOST demo ended"
 
-  sample.ipc.icmsg.nrf54l15_no_multithreading:
-    platform_allow: nrf54l15dk/nrf54l15/cpuapp
+  sample.ipc.icmsg.nrf54l_no_multithreading:
+    platform_allow:
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54lm20dk/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf54l15dk/nrf54l15/cpuapp
     tags: ipc
@@ -67,8 +71,10 @@ tests:
         - "I: Received"
         - "I: IPC-service HOST demo ended"
 
-  sample.ipc.icmsg.nrf54l15_remote_no_multithreading:
-    platform_allow: nrf54l15dk/nrf54l15/cpuapp
+  sample.ipc.icmsg.nrf54l_remote_no_multithreading:
+    platform_allow:
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54lm20dk/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf54l15dk/nrf54l15/cpuapp
     tags: ipc
@@ -89,17 +95,19 @@ tests:
         - "host: Received"
         - "host: IPC-service HOST demo ended"
 
-  sample.ipc.icbmsg.nrf54l15:
-    platform_allow: nrf54l15dk/nrf54l15/cpuapp
+  sample.ipc.icbmsg.nrf54l:
+    platform_allow:
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54lm20dk/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf54l15dk/nrf54l15/cpuapp
     tags: ipc
     extra_args:
       - icmsg_SNIPPET=nordic-flpr
       - icmsg_CONFIG_IPC_SERVICE_BACKEND_ICBMSG_NUM_EP=1
-      - icmsg_DTC_OVERLAY_FILE="boards/nrf54l15dk_nrf54l15_cpuapp_icbmsg.overlay"
+      - icmsg_EXTRA_DTC_OVERLAY_FILE="boards/nrf54l_cpuapp_icbmsg.overlay"
       - remote_CONFIG_IPC_SERVICE_BACKEND_ICBMSG_NUM_EP=1
-      - remote_DTC_OVERLAY_FILE="boards/nrf54l15dk_nrf54l15_cpuflpr_icbmsg.overlay"
+      - remote_EXTRA_DTC_OVERLAY_FILE="boards/nrf54l_cpuflpr_icbmsg.overlay"
     sysbuild: true
     harness: console
     harness_config:
@@ -113,19 +121,21 @@ tests:
         - "host: Received"
         - "host: IPC-service HOST demo ended"
 
-  sample.ipc.icbmsg.nrf54l15_no_multithreading:
-    platform_allow: nrf54l15dk/nrf54l15/cpuapp
+  sample.ipc.icbmsg.nrf54l_no_multithreading:
+    platform_allow:
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54lm20dk/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf54l15dk/nrf54l15/cpuapp
     tags: ipc
     extra_args:
       - icmsg_SNIPPET=nordic-flpr
       - icmsg_CONFIG_IPC_SERVICE_BACKEND_ICBMSG_NUM_EP=1
-      - icmsg_DTC_OVERLAY_FILE="boards/nrf54l15dk_nrf54l15_cpuapp_icbmsg.overlay"
+      - icmsg_EXTRA_DTC_OVERLAY_FILE="boards/nrf54l_cpuapp_icbmsg.overlay"
       - icmsg_CONFIG_MULTITHREADING=n
       - icmsg_CONFIG_LOG_MODE_MINIMAL=y
       - remote_CONFIG_IPC_SERVICE_BACKEND_ICBMSG_NUM_EP=1
-      - remote_DTC_OVERLAY_FILE="boards/nrf54l15dk_nrf54l15_cpuflpr_icbmsg.overlay"
+      - remote_EXTRA_DTC_OVERLAY_FILE="boards/nrf54l_cpuflpr_icbmsg.overlay"
       - remote_CONFIG_MULTITHREADING=n
       - remote_CONFIG_LOG_MODE_MINIMAL=y
     sysbuild: true
@@ -141,17 +151,19 @@ tests:
         - "I: Received"
         - "I: IPC-service HOST demo ended"
 
-  sample.ipc.icbmsg.nrf54l15_remote_no_multithreading:
-    platform_allow: nrf54l15dk/nrf54l15/cpuapp
+  sample.ipc.icbmsg.nrf54l_remote_no_multithreading:
+    platform_allow:
+      - nrf54l15dk/nrf54l15/cpuapp
+      - nrf54lm20dk/nrf54lm20a/cpuapp
     integration_platforms:
       - nrf54l15dk/nrf54l15/cpuapp
     tags: ipc
     extra_args:
       - icmsg_SNIPPET=nordic-flpr
       - icmsg_CONFIG_IPC_SERVICE_BACKEND_ICBMSG_NUM_EP=1
-      - icmsg_DTC_OVERLAY_FILE="boards/nrf54l15dk_nrf54l15_cpuapp_icbmsg.overlay"
+      - icmsg_EXTRA_DTC_OVERLAY_FILE="boards/nrf54l_cpuapp_icbmsg.overlay"
       - remote_CONFIG_IPC_SERVICE_BACKEND_ICBMSG_NUM_EP=1
-      - remote_DTC_OVERLAY_FILE="boards/nrf54l15dk_nrf54l15_cpuflpr_icbmsg.overlay"
+      - remote_EXTRA_DTC_OVERLAY_FILE="boards/nrf54l_cpuflpr_icbmsg.overlay"
       - remote_CONFIG_MULTITHREADING=n
       - remote_CONFIG_LOG_MODE_MINIMAL=y
     sysbuild: true