There was at least one unexpected guest to show up at Rob Kardashian's birthday party!

His ex-fiancée Blac Chyna ended up making a surprise appearance at the party his family threw for him on his 30th birthday, despite the fact that they’ve recently split up and aren’t together anymore. But Chyna brought their four-month-old daughter Dream along with her so that Rob could celebrate with his baby girl.

“The best gift of all!!!” he wrote in the caption of Dream dressed in a St. Patrick's Day outfit.

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Rob and his family shared photos and videos from his day on Snapchat. The party was kept to family members only and his sisters Khloé Kardashian and Kourtney Kardashian were in attendance, along with his mom Kris Jenner and Kourtney’s kids. Since his birthday falls on St. Patrick’s Day, his family used the Irish holiday as a theme for the party — complete with green and gold balloons, leprechaun hats, and a cake that featured a childhood photo of Rob dressed up like Robin Hood.

Chyna and Dream joined everyone at the Cinepolis Luxury Cinemas in Westlake Village, CA where everyone enjoyed a screening of Disney’s live-action remake of Beauty and the Beast — and sources told People that the afternoon outing was filmed for the upcoming season of Keeping up With the Kardashians.

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“Blac Chyna was there because they filmed it. She brought black and gold balloons and a gift. It was civil despite all the custody drama,” the insider revealed. “Rob seemed happy. He spent some time with his baby daughter before they all watched a movie.”

Even though Chyna attended her ex-fiancé's birthday party, it doesn’t seem like they’re going to rush into reconciliation any time soon — they even sat apart during the movie.

Scroll through the gallery below to see photos of Rob, Chyna and Dream during happier times.