Conor McGregor shares adorable snaps for his son's birthday

Conor McGregor's son Junior has turned five and the mixed martial artist shared sweet snaps of his little boy's birthday celebrations on Friday.

The Irish native, 33, uploaded photos of his family at dinner and showed off the birthday boy's Marvel superhero themed cake, topped with a fondant Spider-Man.

In an Instagram post to his 45.1 million followers, the UFC fighter said: 'My boy is 5!!'

Conor Jr was pictured cuddling up to his father and throwing a peace sign as the two sat at a restaurant table.

A snap of the little boy brandishing a toy sword as Conor holds him in his arms was also included in the birthday post.

Conor also shared photos of the rest of the family enjoying the outing, including shots of him cuddling up to fiancée Dee Devlin, 34, and daughter Croia, three. 

He also shared a sweet moment with his youngest child Rian, who will be one this month, as he hugged him close.

The post racked up more than 204,000 likes - with Conor receiving congratulatory comments from fellow MMA fighters including Artem Lobov, Cian Cowley, Kiefer Crosbie and Paddy 'The Hooligan' Holohan - all wishing Conor Jr a happy birthday.

The fighter also then shared some adorable throwback pics of Conor Jr in a bright purple suit.

Conor wore an artful pastel-print jumper which showed off his toned muscles to the family outing, as well as a flashy golden watch.

On Tuesday Conor and Dee looked happier than ever as they posed for sweet Instagram snaps on a yacht during a sun-soaked getaway in an unknown location.

He showed off his muscular physique as he went shirtless while chilling out with his swimsuit-clad partner, whom he called his 'big busty woman'.

Conor shielded his face from the sun with a straw sun hat, which Dee soon swiped for herself and pose with in several snaps.