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 "Thor" star Chris Hemsworth and wife Elsa Pataky hit the beach in St. Barts again this week -- where he flaunted his crazy hot body and she showed off her growing baby bump!

Hemsworth was still in superhero shape has he went for a swim with his wife, plus friends Matt Damon and his wife Luciana.

Just days after announcing her pregnancy, Elsa had no problem showing off her belly -- and she's already starting to show.

The couple is expecting their first child in the spring.

Check out some more incredibly sexy shots of Hemsworth in the gallery above!