A source tells E! News the exes ran into each other at the Playboy Midsummer Night's Dream party over the weekend, and, despite partying right next to each other, were totally cool.
"[They] were partying just a few feet from one another," the source told us. "Bella came with her sister and Gregg came with a male friend."
We're told the two "chatted briefly" before going off and doing their own thing. Gregg was photographed with Tyler Posey at one point, wearing a superhero-themed robe.
Courtesy Mike Windle/Getty Images for Playboy Enterprises
Meanwhile, Bella and Gregg mutually decided to break up after one year of dating earlier this month.
"After much thought and soul-searching, we have made the difficult decision to end our relationship," the actors told E! News in a joint statement. "We will always love each other and have a deep respect for one another, as we have each grown to be better people because of our time together."
They added, "Our schedules made seeing each other difficult, and we decided that for now this would be best."
When a fan expressed dismay over the couple's breakup via Twitter, Thorne said not worry. "Things just didn't end up working the way we had hoped," the Shake It Up actress tweeted. "But I'll always love the bub."
Last week, Bella also came forward and revealed she's bisexual.
When a Twitter follower posed a personal question to the actress: "Are you bisexual? @BellaThorne." Using just one word, Bella responded with the word "Yes."
The message immediately got support from hundreds of fans including Ariel Winter who Retweeted the conversation.
And when one fan revealed he hopes to "have a chance" to date the 18-year-old, Bella replied, "Why wouldn't you have a chance?"
"Aww thank you for all the accepting tweets from everyone," she wrote on social media. "I love you guys ❤❤❤ #pride."
—Reporting by Alli Rosenbloom