The 'Home' singer's little boy is set to undergo treatment for liver cancer.
Watch a clip from Twilight: Breaking Dawn Part 2!
Changing Styles: Kristen Stewart
The final Twilight film premieres in the UK tonight, so we take a look at Kristen 'Bella' Stewart throughout the years...
Watch Kristen Stewart arm wrestle in the first clip from the forthcoming conclusion to the Twilight saga!
Bella, played by Stewart, is now a fully fledged vampire - though she makes her father think she's still human by changing her red eyes back to brown.
'Well done Bella,' says Jackson Rathbone's Jasper. 'I've never seen a newborn show that kind of restraint.'
Bella then arm wrestles Emmet to prove that she's a worthy addition to the Cullen family!
Watch the clip below:
The star headed straight from the jungle to panto...but clearly hadn't had time to learn her lines!