On a boat ride around the famous party island, Elsa Pataky, Spanish actress and model, looked stunning in a black bikini.

Chris, 39, wore boardshorts and a black T-shirt to cover his famous face from the sun and reveal his six-pack abs.

The Hemsworth family started celebrating the birthday with lunch and cake at his lookalike father’s soiree, which he shared on Instagram.

The captions said, ‘Happy birthday to my dad the greatest man I know! My hero, my mentor, my inspiration. Love ya dad,’

Afterward, Chris, Liam, Leonie, 63, and Craig posed together with their arms around each other, before the Thor star took a selfie wearing a party hat from Mykonos.

He shared happy snaps of his lookalike father's soiree to Instagram as the Hemsworth family started the birthday celebrations with lunch and cake. Pictured with his brother Liam, and parents Leonie, 63, and Craig

Chris’ megastar pal Matt Damon, 52, and other family members have spent most of the week on Mykonos with the Hemsworths.

An exclusive guest list included Matt and his wife Luciana Barroso, Chris and an Australian model Gabriella Brooks, Liam’s girlfriend Lauren Phillips, and AVMIN air boss Paul O’Brien.

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About Elsa Pataky :

Elsa Lafuente Medianu, known professionally as Elsa Pataky, is a Spanish model and actress. Pataky is known for her role as Elena Neves in the Fast & Furious franchise. She has appeared in the films Snakes on a Plane, Giallo and Give ‘Em Hell, Malone. She also starred in the Spanish film Di Di Hollywood