Sir Rod Stewart's son announced his engagement to his model girlfriend Nicole Artukovich weeks after welcoming their first child.
The couple, both 28, celebrated with friends on a boat trip near Long Beach in California over the weekend.
They then shared a loved-up photograph on Instagram to announce the news.
In a picture announcing the news Nicole held her left hand up, showing off her sparkler, with the caption 'Forever'.
Nicole showed off the huge square cut diamond which was placed on a delicate gold band while kissing the father of her child.
Liam, 28, is the son of rocker Rod and model Rachel Hunter. Rachel was Rod's second wife and they also share daughter Renee together.
Liam's step-mum Penny Lancaster was amongst the first of famous faces to congratulate the couple writing: "So magical, congratulations."
Sister Ruby penned: "It’s about time! Love you two! Congrats!"
While pal Remy Taylor wrote: "this makes my heart happy, finally you two!!!"
Proud dad Rod, who is currently touring the UK, became a grandad twice in one month after his daughter Ruby also gave birth to a baby boy with her fiance Jack Kalic.
Last month the couple welcomed their son Louie Mark Roderick Stewart, who was named after his rocker grandfather.
Sharing a picture of the newborn on his Instagram, wearing a Celtic shirt and hat, Liam penned: "Welcome lad love you. American, British, Croatian, Kiwi. Louie Mark Roderick Stewart 5.12.23."
And days later, Ruby announced that her bundle of joy had arrived just four days before their little cousin.
She wrote: "This love… unlike any other love I’ve ever known…. I am only a mirror of what I feel from you… I can’t remember what life was like before you…. But nothing else matters now that you’re here… Your arrival into the world marks the beginning of our family… it all started with you Otis… Otis Stewart Kalick."
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