Ex marks the sore spot for Scarlett Johansson!

A source tells the new issue of Us Weekly (out Friday) that the 27-year-old is fuming that her ex-husband, Ryan Reynolds, has moved on with Gossip Girl‘s Blake Lively — even though Johansson ended their two-year marriage one year ago.

“Scarlett is pissed that he’s not under her spell anymore,” the source tells Us. “She realized what a great catch Ryan was.”

When Johansson briefly dated Sean Penn for five months earlier this year, she effectively halted any plans for a reconciliation.

“Ryan would have gotten back with her. He was so totally in love,” says the insider,” but then she flaunted Sean right after their split, and he was done.”

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Adding insult to injury for the Iron Man actress? Lively, 24, is sticking around as things get more serious with Reynolds.

“Things are great [for Blake and Ryan],” says the source. “They haven’t had a fight yet!”

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