The Oscar-winning actress was all smiles as she met up Wednesday with former hubby Ryan Phillippe at a track and field event for their two children, 13-year-old Ava and 9-year-old son Deacon.
According to X17online, the exes chatted and looked to be getting on well.
"Reese and Ryan talked for a very long time, and they were smiling and laughing," an eyewitness told the site. "They had a lot to say to each other, which is very unusual."
Noticeably absent, however, was Reese's 42-year-old husband, Jim Toth.
The agent and his Legally Blonde missus made headlines on April 19 after he was busted for over for driving under the influence in Atlanta and Witherspoon ended up being taken into custody after disobeying an officer's orders to stay in the vehicle.