Complex sentence: In the 2010 film, Tweedledum and Tweedledee are portrayed by Matt Lucas, whose face was digitally added to the bodies of both Tweedledum and Tweedledee.
Split into simpler sentences: In the 2010 version, Tweedledum and Tweedledee are portrayed by Matt Lucas. His face has been digitally added to the bodies of both Tweedledum and Tweedledee.