Chris Hemsworth marks son Sasha's milestone win

Chris Hemsworth is celebrating his son Sasha's major milestone.

On Monday, the 41-year-old actor took to his Instagram account to mark his 10-year-old son's first-ever surfboard riding competition.

In the celebratory post, the Avengers star shared some clips from the competition, titled Byron Bay Boardriders Juniors which took place in Australia.

The competition was not only Sasha's first but it was also his first-ever win.

"So happy for my boy winning his first board riders comp," the proud dad gushed over his victory in the caption.

The clip featured Sasha dragging his boat back onto the beach while his friends and family cheered for him.

In the carousel, an image on the second slide showed Hemsworth's wife Elsa Pataky sweetly embracing their son while posing for the picture.

"Big thanks to @byronbayboardriders," the actor gave a shoutout to the event management.

It is pertinent to mention that Hemsworth and Pataky share twins Sasha and Tristan and 1a 2-year-old daughter India Rose.