updated 11/09/2010 AT 11:00 AM ET
•originally published 11/09/2010 AT 12:30 PM ET
After becoming engaged last week, the couple took a quick trip to Mexico. And the party continued Monday, as they enjoyed a night out in Lachey’s hometown of Cincinnati on the eve of both of their birthdays. (Lachey turns 37 on Tuesday, while Minnillo is 30.)
After attending the Cincinnati Bengals football game, the couple arrived around 12:30 a.m. through the back door of the Mainstay Rock Bar, where they partied with friends on the second floor, which they had rented out with a private deejay and bar.