02/17/2014 06:55 pm ET Updated Feb 18, 2014

Pete Wentz And Girlfriend Meagan Camper Expecting A Baby

Congrats go out to Pete Wentz!

The rocker and his longtime girlfriend Meagan Camper are expecting their first child, the Fall Out Boy bassist announced on Instagram Monday (Feb. 17). "We're super excited to announce we're expecting a baby!" he wrote on his account, posting the below photo.

Wentz, 34, and model Camper have been dating for nearly three years. He was previously married to Ashlee Simpson, and the pair have a 5-year-old son, Bronx, together. Simpson, 29, recently announced her engagement to boyfriend, Evan Ross.