Posting on his Twitter account on Monday night (March 27), One Direction star Liam wrote: "Thank you to everyone for the love and supportive messages for myself and @CherylOfficial. It really means a lot."
Awwww.
And later on in the evening, he had another message which accurately sums up being a new parent...
Cheryl's former Girls Aloud bandmate Nadine Coyle was the first to send her well-wishes to the new family.
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"Congratulations @cherylofficial I am so so happy for you & your precious little boy & family! Sending you loads of love!" Nadine wrote, followed by many more tributes from their showbiz pals.
Cheryl and Liam first met when Liam auditioned for The X Factor in 2008, getting as far as Judges' Houses while Cheryl was a judge on the ITV talent show.
But although Simon Cowell decided not to send Liam through to the live shows, the youngster auditioned again two years later – while Cheryl was still on the series – this time finding his luck as part of One Direction.
It was some six years later when we discovered that the pair were dating, as news broke soon after Cheryl announced she was splitting from her then-husband, Jean-Bernard Fernandez-Versini.
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