Sienna Miller, Benedict Cumberbatch and Keira Knightley have led a star-studded festive video treat for fans.

The British stars all appear in a clip in which they reach out to fans over the festive period.

Sienna leads the glamorous clip, telling viewers to have a 'Happy Holidays' from the red carpet.

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Starry starry night: Sienna Miller is among the famous faces wishing fans a Merry Christmas in a celebrity-packed clip

Her pal and The Edge Of Love co-star Keira, who is expecting her first child with s greetings, saying: 'Hi, Happy Holidays.'

Newly-engaged Benedict also appears, adding: 'Happy Holidays. Take care.'

Fellow dapper actor Eddie Redmayne says: 'I love Christmas. It's my favourite time of year. Happy, happy Christmas 2014. I think it's been a good year. I hope you've had a good year.'

Next year also looks set to be a good year for the star - he's tipped for an Oscar nomination for his portrayal of scientist Stephen Hawking in The Theory of Everything.

Great year: Benedict Cumberbatch, who got engaged to Sophie Hunter in November, wishes fans a 'Happy Holidays'

Mum-to-be: Keira Knightley has a lot to look forward in the New Year - she's expecting her first child

Queen's speech: Dame Helen Mirren tells fans to 'sparkle' over the festive season

The Hobbit's Martin Freeman also reaches out to fans, saying: 'I wish you all a very Merry Christmas and a very happy New Year and I hope you have a great 2015 as they say in the future.'

While an excitable Emma Thomas reveals just how much she loves the festive season - as long as it's well organised.

The Oscar winner advises: 'My darlings, it's Christmas. I know, I know. I feel exactly the same way. All I can say is plan ahead. I've already made my vegetable list.

'What I've done is you know worked it out from the 22nd right through to the New Year otherwise I'm just you know I'm stuck with a sack full of mouldy potatoes. You know what I'm saying?

Festive cheer: Supermodel Doutzen Kroes blows a kiss to fans this Christmas

Seasons greetings: Hunky actor Jude Law also reaches out to fans

What's her secret? Adriana Lima looks particularly ravishing as she wishes fans a Happy Christmas

'So planning, planning and then it's cheaper too. Good luck. I know exactly how you're feeling... stressed out and just -- when is it all going to be over? It's just a few days now. Don't panic. You'll get there.'

Actor Jim Carrey shared some words of advanced sympathy for those who will feel overwhelmed by the number of family members they will have to deal with over the festive period.

'I hope you survive your families this Christmas, 'Carrey said.

One celebrity, however, wasn't too much in the holiday spirit.

Magical: The Hobbit castmember Lee Pace, Evangeline Lilly and Orlando Bloom sing 'We Wish You A Merry Christmas'

Rockin' Christmas: Sting tells fans 'Peace, love, understanding'

Bond new 'M', Ralph Fiennes, growls: 'I hate Christmas so I don't think I'll be very good at that,' while his Spectre co-star Naomie Harris was slightly more upbeat.

The beauty said: 'Really enjoy it, spend it with your family and have an amazing time.'

Other stars who appear in the video include Jane Lynch, Dame Helen Mirren, Sir Ben Kingsley, Jude Law, Lee Pace, Orlando Bloom, rock legend Sting, tennis champ Andy Murray and Victoria's Secret beauties Doutzen Kroes and Adriana Lima.