Written by Bonnie Gibbs Vengrow
For most of the 47-second video, the charming "Girls" actor sticks to the script. He introduces himself, says which charities he's donating to, dumps a huge bucket of icy water on his head, and even yelps out some mild curses (natch). But then he nominates his unborn child!
"I'd like to nominate Baby O'Porter," he says, and then turns the camera to his pregnant wife, Dawn O'Porter. The mom-to-be pours a glass of ice water over her obvious bump and lets out a little shriek. "So brave!" O'Dowd says in the final moments, a huge grin on his face. I'm calling it now -- best baby announcement of the summer.
This will be the couple's first child together; they were married in 2012.
Tell us: Would you try the Ice Bucket Challenge while pregnant?
Image of Chris O'Dowd and Dawn O'Porter courtesy of Shutterstock