The 42-year-old Oscar nominee shared the silly pics he's been posting on the web, calling out one photo he snapped while on set of Avengers: Age Of Ultron. "I was bored on the set. We were doing the scene with [Johansson's] stunt double and she wears this kind of mask and I wanted to wear it," he explained to Fallon.
Needless to say, the end result is frightening when you combine Hawkeye (Renner) and the Black Widow (Johannson). Even Renner admitted, "It's creepy, right?!"
The Hurt Locker actor really enjoys dressing up. He also shared with Fallon a Throwback Thursday selfie of him dressed for an 80s themed prom party. After ragging on Renner about looking like the brother of Duran Duran frontman Simone Le Bon, the late-night host had to one-up him and show his own 80s themed prom pic.
Who looks better in their pale blue digs?
Renner is currently promoting his new crime-drama film Kill the Messenger, out Oct. 10, 2014.