Springwatch and Dancing on Ice star Michaela Strachan has revealed her delight at becoming a grandmother. The 59-year-old posted a video clip comprised of sweet snaps of the new arrival to her Instagram explaining her step-son Thomas Chevallier welcomed a baby boy with partner Mikayla Humphries on Tuesday.

The natural history presenter, who has been a fixture on Springwatch since 2011, told her followers that Mikayla had given birth after a "long and stressful" labour which lasted 55 hours. "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, Jack were a wee bit emotional. Welcome to the world baby Huxley. So, so precious," she wrote. In one image she can been seen beaming broadly as she cradled the newborn while Tom stands beside her. "Granny, dad Tom and baby Huxley," she captioned it adding a yellow love heart at the end.

Fans were quick to flood the star's comments with congratulations on the new arrival.

"Congratulations to all! It’s the most special thing becoming a granny," one penned. "Congratulations to you all, it’s just the best being a grandparent x," another agreed.

"Congratulations. Grandparent is the best job in the world, you will love it," a third enthused. "Congratulations & all the best & U look so happy," a fourth chimed in.

"Congratulations! It’s the best, having grandchildren," a fifth enthused. "So precious, hope mum and little one are doing really well," a sixth commented.

Michaela will become a grandmother for the second time in September when her stepdaughter Jadie Alice gives birth.

The star announced both imminent births in April on her Instagram page , labelling it a "blessing" and saying that being a grandma is "something she needs to get her head around."

"Surprise, surprise! It seems I am going to get 2 grandchildren this year!! What a blessing. My step son @tchev3000 is expecting a little boy with @finalfinal.jpeg at the end of this month and my step daughter @jadiealice is expecting in Sept with her husband @dale_manning.

She added: "Dancing On Ice was a chapter of my life that made me feel 10 years younger, so this next chapter, becoming a grandma, is something I need to get my head around!! "Been quite a year so far and we’re only in April!!" [sic]