Zac Efron flashed an ear-to-ear grin on Dec. 15, a little over a month after breaking his jaw and having his mouth wired shut Credit: courtesy of Matt Overton

There's that megawatt smile! Zac Efron flashed an ear-to-ear grin at the Indianapolis Colts game on Sunday, Dec. 15, just a little over a month after he broke his jaw and had to have his mouth wired shut. Colts player Matt Overton posted a photo with the actor after the game, showing Efron in the locker room at Lucas Oil Stadium.

"Winning feels so damn good! Zac Efron came to party too," Overton captioned the picture. (The Indianapolis Colts beat the Houston Texans 25 to 3 on Sunday.)

In the photo, the NFL star stands beside the Paperboy actor while giving a "thumbs up" sign to the camera. Efron, meanwhile, is holding a football and wearing a blue Santa hat and a Members Only jacket -- not to mention a big grin.

As previously reported, the 25-year-old High School Musical alum broke his jaw following a nasty fall at home. His pal Adam Shankman, who worked with the star on Hairspray (and recently entered rehab), told Us Weekly he was helping to nurse Efron to recovery. 

"I have been at his house every day and I have been making him soup. He has been drinking it through his straw," Shankman spilled to Us on Thursday, Nov. 14, at the 6th annual Go Go Gala in L.A. "He has to eat through a straw on a syringe. It's horrible."

Thankfully, the worst of the ordeal appears to be over. Efron was photographed earlier this month going skateboarding -- but not yet smiling -- in L.A.