Ashlee Simpson-Wentz Ready to Pop Any Day Now

Ashlee Simpson is due to give birth any minute, Pete Wentz says.

"She is very pregnant," the Fall Out Boy bassist told Ryan Seacrest Thursday. "I am on call permanently right now. She's at the very end, and it could happen at any point."

Wentz adds that Simpson-Wentz, 24, is "excited" to give her pimp, Joe Simpson, his first grandchild and newest client become a mom.

"She feels hot all the time," says Wentz, 29, joking that their thermostat is set to 34. "I think she wants to just be not pregnant anymore... It's a struggle to go up and down the stairs. Going out in public is insane."

Another milestone the newly-married pair is looking forward to is naming their little bundle of the joy – but not until after the birth.

"I want to meet (the baby) first," says Pete Wentz.

"My friend said it – you've gotta have a baby with a name that could be a rock star or a senator, so he'll get work either way."