Co-stars saddened by loss of Robin Williams at film premiere

Dan Steinberg/Dan Steinberg/Invision/AP Robin Williams played Teddy Roosevelt in hugely successful “Night at the Museum” trilogy. 

The celebs were out for the “Night at the Museum 3” New York premiere, but there was one star who was missed – the late, splendid Robin Williams, who plays Teddy Roosevelt in the hugely successful trilogy.

“I know I…