Dianna Agron Splits from Sebastian Stan

“Glee” star Dianna Agron is single again. She’s reportedly split from Captain America star Sebastian Stan.

Dianna began dating Sebastian in July following her break-up from her I Am Number Four co-star Alex Pettyfer in February. The romance has apparently ended, though, because Dianna is in Los Angeles filming while Stan is based in New York.

A source tells New York Post’s Page Six, “Long-distance wasn’t working. Dianna’s coming to New York for Christmas with her mom, so they might rekindle the flame.”

However, according to other sources, jealousy might have also been an issue. Sources tell US Weekly, “She was always worried that he was cheating on her while he was away filming, but he never would!”

Sebastian previously dated his “Gossip Girl” co-star Leighton Meester.

Dianna also covers the latest issue of Nylon Magazine. She celebrated the cover among friends at The Writer’s Room on December 7 in Los Angeles. Be on the look out for Dianna’s new website, youmeandcharlie.com.