By Kat Giantis
Will it be a really silent night this Christmas for Kelly Osbourne and her big sis? So claims the London Daily Mirror, which says an ongoing cold war between the size 2 starlet, 26, and her spotlight-averse sister, Aimee, 27, has put a damper on the family's holiday festivities.
"Aimee and Kelly haven't spoken for months after an almighty row," says a source. "They've always had a challenging relationship, but this last row seems to have tipped them both over the edge."
RELATED: Kelly reveals how she lost 50 pounds
According to the paper, the siblings' supposed feud means that parents Ozzy and Sharon will have to divvy up their time on Christmas Day, the same way they allegedly did on Thanksgiving, joining Aimee in the morning and Kelly in the evening.
"It's become a nightmare situation for the whole family. Sharon's distraught about what's happened. Neither girl will back down," continues the snitch. "Kelly's been telling her friends that the family will have to get used to the fact that they just don't get on ... Hate is a strong word. But they really don't like each other."
But that's news to Kelly, who has been hanging with Miley Cyrus while filming "So Undercover" in New Orleans.
RELATED: Kelly named 'body of the year'
She took to Twitter on Sunday night to assure everyone that love is all around in the Osbourne household this holiday season.
"We are both spending Xmas together in the UK!" wrote Kelly. "I love my sister."
Get all the scoop on "The Bachelorette" on Replay hosted by Wonderwall's Kirby Kristen.Watch Video »
Channing Tatum, Jada Pinkett Smith and Stephen "tWitch" Boss dish on what their spouses really think of their steamy "Magic Mike XXL" roles.Watch Video »
Channing Tatum, Joe Manganiello and co-stars dish on being naked and wearing thongs on the set of "Magic Mike XXL" with Wonderwall.com's Kirby Kristen.Watch Video »
Jada Pinkett Smith, Amber Heard and co-stars dish on what it was like on set of "Magic Mike XXL" with Wonderwall.com's Kirby Kristen.Watch Video »
'Bachelor' Women’s 'Bachelorette' Picks
During "The Bachelor: On the Wings of Love: After the Final Rose" wrap-up of the season, the name...Watch Video »
From Kate Hudson to Tyra Banks, check out these gorgeous stars sans makeup!Watch Video »