diff --git a/indra/newview/llgroupactions.cpp b/indra/newview/llgroupactions.cpp
index ff75d461df11d689f09186ae362d78020f040b63..22658b4d65a3704ef070e7fb8f610b7e9025cfe1 100644
--- a/indra/newview/llgroupactions.cpp
+++ b/indra/newview/llgroupactions.cpp
@@ -118,6 +118,36 @@ void LLGroupActions::search()
 	LLFloaterReg::showInstance("search", LLSD().with("category", "groups"));
 }
 
+// static
+void LLGroupActions::startCall(const LLUUID& group_id)
+{
+	// create a new group voice session
+	LLGroupData gdata;
+
+	if (!gAgent.getGroupData(group_id, gdata))
+	{
+		llwarns << "Error getting group data" << llendl;
+		return;
+	}
+
+	LLUUID session_id = gIMMgr->addSession(gdata.mName, IM_SESSION_GROUP_START, group_id, true);
+	if (session_id == LLUUID::null)
+	{
+		llwarns << "Error adding session" << llendl;
+		return;
+	}
+
+	// start the call
+	// *TODO: move this to LLIMMgr?
+	LLIMModel::LLIMSession* session = LLIMModel::getInstance()->findIMSession(session_id);
+	if (session && session->mSessionInitialized)
+		gIMMgr->startCall(session_id);
+	else
+		gIMMgr->autoStartCallOnStartup(session_id);
+
+	make_ui_sound("UISndStartIM");
+}
+
 // static
 void LLGroupActions::join(const LLUUID& group_id)
 {
diff --git a/indra/newview/llgroupactions.h b/indra/newview/llgroupactions.h
index 9750b3e3cb7af2a54c1ada7c479fd29eb8a037ea..e99df86cd9b69cfeff41f2872d176ced81f17471 100644
--- a/indra/newview/llgroupactions.h
+++ b/indra/newview/llgroupactions.h
@@ -98,6 +98,11 @@ class LLGroupActions
 	/// Returns if the current user is a member of the group
 	static bool isInGroup(const LLUUID& group_id);
 
+	/**
+	 * Start a group voice call.
+	 */
+	static void startCall(const LLUUID& group_id);
+
 	/**
 	 * Returns true if avatar is in group.
 	 *
diff --git a/indra/newview/llpanelpeople.cpp b/indra/newview/llpanelpeople.cpp
index e1348401533c804ccadff662eab9645c31c7e139..e5846c7318a6485d4ef20de9ff59eac6163c67cd 100644
--- a/indra/newview/llpanelpeople.cpp
+++ b/indra/newview/llpanelpeople.cpp
@@ -564,6 +564,7 @@ BOOL LLPanelPeople::postBuild()
 	buttonSetAction("chat_btn",			boost::bind(&LLPanelPeople::onChatButtonClicked,		this));
 	buttonSetAction("im_btn",			boost::bind(&LLPanelPeople::onImButtonClicked,			this));
 	buttonSetAction("call_btn",			boost::bind(&LLPanelPeople::onCallButtonClicked,		this));
+	buttonSetAction("group_call_btn",	boost::bind(&LLPanelPeople::onGroupCallButtonClicked,	this));
 	buttonSetAction("teleport_btn",		boost::bind(&LLPanelPeople::onTeleportButtonClicked,	this));
 	buttonSetAction("share_btn",		boost::bind(&LLPanelPeople::onShareButtonClicked,		this));
 
@@ -733,6 +734,7 @@ void LLPanelPeople::updateButtons()
 	buttonSetVisible("view_profile_btn",	!group_tab_active);
 	buttonSetVisible("im_btn",				!group_tab_active);
 	buttonSetVisible("call_btn",			!group_tab_active);
+	buttonSetVisible("group_call_btn",		group_tab_active);
 	buttonSetVisible("teleport_btn",		friends_tab_active);
 	buttonSetVisible("share_btn",			nearby_tab_active || friends_tab_active);
 
@@ -781,6 +783,7 @@ void LLPanelPeople::updateButtons()
 
 	bool none_group_selected = item_selected && selected_id.isNull();
 	buttonSetEnabled("group_info_btn", !none_group_selected);
+	buttonSetEnabled("group_call_btn", !none_group_selected);
 	buttonSetEnabled("chat_btn", !none_group_selected);
 }
 
@@ -1272,6 +1275,11 @@ void LLPanelPeople::onCallButtonClicked()
 	}
 }
 
+void LLPanelPeople::onGroupCallButtonClicked()
+{
+	LLGroupActions::startCall(getCurrentItemID());
+}
+
 void LLPanelPeople::onTeleportButtonClicked()
 {
 	LLAvatarActions::offerTeleport(getCurrentItemID());
diff --git a/indra/newview/llpanelpeople.h b/indra/newview/llpanelpeople.h
index f5cdc0935c3db29c7397cd402bd43842b97b2440..0d2bae1bafd483a548b79390bdd562a49f1466a7 100644
--- a/indra/newview/llpanelpeople.h
+++ b/indra/newview/llpanelpeople.h
@@ -100,6 +100,7 @@ class LLPanelPeople : public LLPanel
 	void					onChatButtonClicked();
 	void					onImButtonClicked();
 	void					onCallButtonClicked();
+	void					onGroupCallButtonClicked();
 	void					onTeleportButtonClicked();
 	void					onShareButtonClicked();
 	void					onMoreButtonClicked();
diff --git a/indra/newview/skins/default/xui/en/panel_people.xml b/indra/newview/skins/default/xui/en/panel_people.xml
index 8883c27c47f5a3b0f7ea00ff0525fa5c219ca234..08a10553a86a0b50c85948c1433ca1717ea18953 100644
--- a/indra/newview/skins/default/xui/en/panel_people.xml
+++ b/indra/newview/skins/default/xui/en/panel_people.xml
@@ -411,5 +411,15 @@ background_visible="true"
          name="chat_btn"
          tool_tip="Open chat session"
          width="110" />
+        <button
+         follows="bottom|left"
+         top="4"
+         left_pad="2"
+         height="23"
+         label="Group Call"
+         layout="topleft"
+         name="group_call_btn"
+         tool_tip="Call this group"
+         width="110" />
     </panel>
 </panel>