There are lots of characters, props and animals inside iClone or in the online marketplace. You may export these characters with perform animations to Unreal in FBX format via 3DXchange5.
Go to "File" >> "Export to other 3D format" >> "FBX", Select preset as "Game Engine - Unreal" in the FBX export window.
Set "Package", "Grouping" and "Name". Select Import Type as "Skeletal Mesh".
Double-click on your "Skeletal Mesh" to open AnimeSet Editor. Create "New AnimSet" to enable "Import FBX animations". You'll see your animation in the "Anim" list after importing.