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Guess it really is possible to stay friends with your ex!

Sandra Bullock proved that there's absolutely no harsh feelings between Mathew McConaughey -- who she dated back in the '90s -- and his wife Camila Alves, when the two mothers were snapped on a playdate Wednesday afternoon at Carousel Gardens Amusement Park and Storyland in New Orleans. Clad in a hat and sunglasses, Sandra cuddled baby Louis, 2, in her arms while riding a train, seated next to Camila, who had her own hands full with Levi, 4, and Vida, 2.

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Camila is in New Orleans to visit Matthew, who's currently filming The Dallas Buyers Club, a film that's already getting tons of buzz due to Matthew's substantial weight loss in order to play AIDS patient Ron Woodroof.