He's calling her out!

On Saturday, Justin Theroux decided to do his part in the fight against ALS as he completed the now popular ice bucket challenge and nominated fiancé Jennifer Aniston in the process!

The 43-year-old Leftovers star took on the challenge with relative ease thanks to the help of friend Jimmy Kimmel, who also posted the video online.

"I would like to challenge members of the Lab[yrinth] Theater Company in New York," Theroux said. "...David Lynch and because she's not here to see me do this -- Miss Jennifer Aniston."

Check out his reaction afterwards in the video!