Ryan Reynolds and Rupert Grint have donned a "milk moustache" as part of a campaign to encourage people to drink milk.
Ryan, star of the new film Green Lantern, is pictured wearing his superhero suit with the signature mark on his upper lip.
The Canadian actor and 22-year-old Harry Potter star Rupert, who plays Ron Weasley in the wizarding franchise, will appear on billboards around Britain.
They are the latest celebrities to back the "make mine milk" campaign, a spokeswoman said.
"I come from a big family and my mum always made sure we had lots of milk to drink as kids," said Rupert.
"It's low in fat, refreshing and good for you, and really tasty too."