Credit: Christopher Polk/ACMA2011/Getty Images

It's a good thing Jake Gyllenhaal steered clear of Las Vegas this weekend.

After all, the 30-year-old Source Code actor's exes, Taylor Swift and Reese Witherspoon, came face-to-face for the first time at Sunday's Academy of Country Music Awards.

Fortunately, the "Mean" singer, 21, and just-wed Witherspoon, 35, showed no signs of hostility at the star-studded event, where they happily posed for photos together during the show.

Swift -- who won the Entertainer of the Year award -- even chatted with about her big win.

"This is absolutely mind-blowing to me," Swift (in Elie Saab) told Us. "It's from the fans, and that means the world."