It appears that Scarlett Johansson’s relationship with her studly hubby Ryan Reynolds is already on the rocks.

The couple — who married in Canada less than a year ago — were reportedly seen arguing at the recent Comic-Con sci-fi convention in San Diego, CA.

Scarlett, there to discuss her new role as Black Widow in Iron Man 2, was set to appear on her panel with Robert Downey Jr. and other cast members. Ryan was just cast as the lead in Green Lantern, a Warner Brothers flick.

“They got in a huge fight just before they were going to Comic Con,” a source tells Fox411. “It caused such a rift between them that Ryan refused to attend the conference and he told Scarlett she could go alone. She got so angry she threatened to take off her wedding band. Ryan pulled out at the last minute and word spread fast. He isn’t making a show of good faith to the Warner team after they battled over the decision making him Green Lantern. Scarlett ended up looking like the true professional and acted as if nothing was wrong, answering questions for fans and posing for pictures. It was not a good way for Ryan to begin his work as the star of the movie.”