What character did the House of D actor posthumously play in the film Star Trek Beyond?
House of D:  The film stars Duchovny, Anton Yelchin, Téa Leoni, Erykah Badu, Frank Langella, Zelda Williams, and Robin Williams. Anton Yelchin:  He played Pavel Chekov in three "Star Trek" films, including the 2009 reboot film of the same name, along with the sequels, "Star Trek Into Darkness" and the posthumously released "Star Trek Beyond" (2016).
Pavel Chekov