"Potty training is going so great!" Faris, 38, tweeted at her husband, Chris Pratt. "I'm a natural!"
As seen in the pic, the couple's 3-year-old was out walking with his famous mom when he accidentally wet himself. Fortunately, he was in swimming gear. And despite the mess, he made sure to hold onto his bite-size yogurt melts at the time.
Pratt, 36, who has been on location filming his upcoming movie The Magnificent Seven, sent back the cutest message to his family.
"Those are swim shorts," he tweeted. "Put him in the pool and that's perfectly acceptable behavior. I'm proud of both of you."
Sign up now for the Us Weekly newsletter to get breaking celebrity news, hot pics, and more delivered straight to your inbox!