Thranduil was, of course, also in the Return of the King. He wasn’t in Fellowship though; that’s why he sent junior to tell the Council of Elrond that Smeagol managed to escape.
You’d think he’s have learnt a thing or two from letting 13 dwarves escape.
DAMMIT THRANDUIL YOU HAD ONE JOB.
P.S. There’ll be more Hobbit/Tolkien shirts in le webstore in the weeks/months to come, so watch this space guys! Or that space. Or…some space. Meanwhile, there’s the Thranduil shirt.