That was fast!
The Newsroom actress, 33, has moved on to 30-year-old Green Bay Packers Quarterback Aaron Rodgers.
"They're dating" a source confirms to E! News.
The two reportedly met at the 49th Annual Academy of Country Music Awards in Las Vegas on April 6.
Rodgers played college football at the University of California, Berkeley, and was drafted by Green Bay in 2005.
He led the team to a victory in Super Bowl XLV after the 2010 season, and was named Super Bowl MVP.
His coupling with Munn was first reported by Us Weekly.