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Dust off those trainers and dig out your old jersey - Sport Relief is back for another year!

On 13 March, people across the UK will be raising money to help tackle issues including mental health, homelessness and child poverty right across the world.

A number of famous faces will also be getting involved with fundraising this year.

C±«Óãtv presenter Karim Zeroual is the latest famous face to be revealed as part of the team taking part in a four-day mega triathlon on ice in Mongolia.

They'll cycle, skate and trek 100 miles across Lake Khovsgol in the East Asian country. The lake is more than two million years old and freezes during winter - brrrr, that sounds very cold!

Karim said: "After such an incredible time on Strictly, I'm raring for the next challenge - though I'm not sure I'll be as graceful on ice skates!

"The idea of crossing a 100-mile frozen lake sounds pretty daunting right now, but I know that we'll be raising vital funds for Sport Relief and changing lives all over the UK and internationally."

Other celebs who are involved include ±«Óãtv Radio 1 DJ Nick Grimshaw, ±«Óãtv presenter Louise Minchin, singer Frankie Bridge, TV star Judge Rinder, Channel 4 newsreader Krishnan Guru-Murthy and former soapstar Samantha Womack.

Grimmy said: "Super excited to announce that I'll be doing 25 miles a day on ice in Mongolia all in aid of Sport Relief. It's going to be really challenging both mentally and physically, but I can't wait to get started!"

The challenge, called On Thin Ice, aims to encourage more discussion around mental health issues and support people in getting the help they need.

Former professional footballer Rio Ferdinand will also be getting involved with Sport Relief this year.

"Over the years I've learnt that there's much more to sport than winning trophies; there's a lot to gain personally from taking part. Sport has this amazing ability to bring people together and tackle really important issues like mental health stigma, which I'm really passionate about," the sports star and presenter said. "Sport gives you something to focus your energy on, and speaking from my own experiences off the pitch, it's positively impacted my family's lives when going through some hard times."

Gymnast Max Whitlock MBE will be visiting one lucky school as part of a new competition. Schools are being encouraged to share what they've got planned for Sport Relief this year and the winner will get the chance to hang out with the double Olympic gold medallist.

Dynamic duo Gary Lineker and Paddy McGuinness will return as the hosts of this year's show on Friday, 13 March along with lots of other famous guests.

What are you planning to do for Sport Relief this year? Let us know in the comments!