The British actor, 26, and the model were recently spotted walking hand-in-hand down a Beverly Hills street, according to E! News. And a source confirms to PEOPLE that the two are an indeed item again.
However, the source adds that Pettyfer and Horst, 27, are not engaged — despite Horst sporting some jewelry on her ring finger.
The two split back in March, with both Pettyfer and Horst taking to social media to break the news.
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“I wouldn’t normally do this as I like to keep my life private,” the Magic Mike actor wrote in an Instagram post.
“Despite what may be written, Marloes and I split up due to her being a crazy hot supermodel and her and my work just keeping us apart. It was a mutual decision.”
Horst echoed Pettyfer’s statements on her own Instagram account, writing in a now-deleted post, “Despite of what some papers may say, Alex and I split due to our busy schedules.”
Horst and Pettyfer began dating in 2014, with a source describing the couple as “very happy.”