has become a gran for the first time, aged 59, and shared the adorable news with her followers on social media. Taking to , sharing a snap of her stepson, Tom, and his new baby, Huxley, she revealed that her grandson had finally made an appearance after 55 hours of labour as she praised the tot's mum, Mikayla.
In a heartfelt post, she wrote: "Today I became a Granny!!After an extremely stressful and exhausting labour, 55hrs, baby Huxley finally arrived!! So proud of my future daughter in law & my step son Proud new parents. Me and granny were a wee bit emotional. Welcome to the baby Huxley. So, so precious."

Replying to the post, which also included snaps of Huxley's proud mum Mikayala and his doting grannies - Michaela's fans congratulated the Springwatch star on her happy news.
One wrote: "Congratulations to all! It’s the most special thing becoming a granny" while another replied: "Congratulations Michaela. You look so happy!"
Meanwhile, other praised Mikayla for her epic labour, as one replied: "55 hours?! Woah. Congratulations to you all, especially Huxley’s heroic mother!"
Tom's dad, director and cameraman, Nick Chevallier, met Michaela in Cape Town in 2003. In 2006, the couple were overjoyed to welcome their son Ollie, after fears that widower Nick, who already had three children of his own, wouldn't want to become a dad for the fourth time.
Confessing her apprehension during an interview with The Times, Michaela said: "When I got together with Nick, I thought he might feel he didn't want a fourth child of his own. But it all worked out. He adores Ollie."
Opening up about her love of motherhood during a 2016 interview with the Michaela reflected: "When I was younger I was so into my career that I didn't think I'd have a child. I'm so glad that changed.
"There's no love that can compare to what I feel for Oliver and I adore being a mum. But when I first had him it made me realise that we'd got it wrong as a species."
She went onto explain: "I was 39, I had this child, and I realised I knew nothing about babies. I was so naive about how hard it was. I thought, 'Why did nobody tell me about this?'
"If we, as humans, still lived in community structures I would have helped bring up other people's babies and I would have known what it was like. I'm not saying being more like lions is the answer but it's an interesting debate."
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