Doing something funny for money just got even more fabulous.

In addition to her designs for TK Maxx, today exclusively unveils a collection of 25 unique, custom-made T-shirt designs in a bid to raise even more money for year's Comic Relief appeal.

Sticking to the script of iconic, black and white prints of the likes of The Beatles, Kate Moss and Tommy Cooper sporting the charity's famous red nose, the customised line has been hand-worked to give each the appearance of a well-worn, well-loved T.

Each piece is a one-off collector's item, available exclusively at Stella McCartney's London flagship stores from today.

'When you buy a Red Nose Day T-shirt you are giving to a great and worthy charity,' Stella explains. 'I wanted to one step further and get really personal, so I customised a limited number of the T-shirts. They take you one step closer to an individual piece; while you're giving a bit more to Comic Relief, you're receiving a bit more... So it all makes perfect sense!'

We couldn't agree more.

The custom-made Ts cost £50 for adults and £25 for children's sizes, while the mainline versions - which are available now at TK Maxx stores nationwide and online at TKMaxx.com - will set you back £9.99 and £5.99 respectively. Plus, don't forget to pick up your copy of the new-look March ELLE for an exclusive, behind-the-scenes glimpse at Stella's Comic Relief shoot, starring Kate Moss and David Walliams and photographed by Mary McCartney and Helena Christensen.

And, if you needed any more encouragement to get involved, watch Stella, Cameron Diaz, Liv Tyler, David Walliams and James McAvoy tell you why you should in our exclusive ELLEUK.COM video below.

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Comic Relief takes place on Friday, 15 March 2013.