Conor McGregor and Dee Devlin celebrated their oldest son's birthday on Thursday as Conor Jr turned five.
The UFC star shared a number of snaps on Instagram as he paid tribute to his son.
He commented on a post: "My boy is 5!!"
In the photos, McGregor and Dee could be seen smiling alongside Conor Jr and their other two children, Croia and Rian.
The Notorious and his family went to a restaurant, with Conor Jr getting a spiderman decorated cake.
Former Republic of Ireland footballer Robbie Keane and McGregor's coaches John Kavanagh and Owen Roddy were among those to also send birthday wishes to the youngster.
UFC star McGregor is currently on holiday with Dee and their three children in southern France after picking up his new €3.5million Lamborghini yacht earlier this week.
He posted on Instagram after getting the luxury boat: "Today is the day!! We officially take ownership of our brand new Lamborghini Sport Yacht! But first.. the most important meal of the day."
McGregor later posted an image of himself driving the yacht alongside a video, captioned: "Trying to find the words. The supercar of the sea!"
The luxury yacht is known as "the supercar of the sea" and is 63 feet long while capable of producing 2000hp.
With a green hull, the luxury sea-liner pays homage to his whiskey brand Proper Twelve, which he sold in April last year for around $150m. Its luxury interior also catches the eye, and he has secured the Number 12 edition of the yacht in another tribute to his business.
His latest purchase joins a whole host of opulent toys, which also includes a series of cars such as the Lamborghini Aventador Roadster and his Urus.
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