Twenty One Pilots' Tyler Joseph expecting first child

Sept. 9 (UPI) -- Twenty One Pilots frontman Tyler Joseph is going to be a dad.

E! News reported Sunday the 30-year-old singer announced the news by bringing wife Jenna Joseph onstage during Twenty One Pilots' concert Saturday at Lollapalooza Berlin.

People said Jenna Joseph showed off her baby bump in a patterned dress. Joseph dropped to his knees to kiss his wife's growing belly as the audience cheered.

"I know I said I'm bringing a couple people onstage, and that's true," the singer said.

Jenna Joseph had teased her Lollapalooza Berlin appearance while sharing photos in August from Lollapalooza Chicago. She obscured her baby bump in an oversized t-shirt.

"See you at music festivals in Europe soon. I'll be in the popsicle line," she wrote on Instagram.

Joseph and Jenna Joseph married in March 2015.

Twenty One Pilots consists of Joseph, a founding member, and Josh Dun. The duo last released the album Trench in October, which includes the singles "Jumpsuit," "Levitate" and "The Hype."