Tony Romo and Candice Crawford are engaged.

Romo popped the question while celebrating Crawford’s 24th birthday in Dallas, as reported by Gossip Cop.

Crawford, who is the sister of “Gossip Girl” star Chace Crawford, was crowned Miss Missouri in 2008.

No wedding date has been announced.

This should be the final engagement in the domino effect – starting with Nick Lachey, Jessica Simpson’s ex-wife, followed by Simpson herself, who is engaged to Eric Johnson and ending the six degrees of separation with Tony Romo.

Simpson dated Tony Romo a couple of years ago.