Robbie Williams's UNICEF fundraiser returns later this month with more celebrities and ex-footballers duking it out in a one-off match at Old Trafford, Manchester.
Soccer Aid takes place on Sunday, May 27 and will air live on ITV1.
Soccer Aid 2010 saw Williams's England team lose 7-6 on penalties to the Rest of the World after a 2-2 draw. Hollywood star Woody Harrelson scored the winning penalty, and will return for this year's match.
Speaking about covering the match again, Gallacher said: "I had a blast when I co-presented Soccer Aid two years ago. It really is a privilege to be involved in such a great event and to experience some fantastic moments on the pitch."
Talking about her favourite players, she added: "Robbie Williams and Jonathan Wilkes are the lynchpin of the England team and Olly Murs played a blinder two years ago! As for the players on the Rest of the World team, Ruud Van Nistelrooy is a goal-scoring machine!"
The teams for Soccer Aid:
Captain: Robbie Williams
Team: Jason Isaacs, Mark Owen, Marvin Humes, Aston Merrygold, Olly Murs, John Bishop, Jonathan Wilkes, Ben Shephard, Jamie Theakston and Paddy McGuinness.
Football legends: Teddy Sheringham, David Seaman, Kevin Phillips, Des Walker and Martin Keown.
Coached by Bradley Walsh.
Rest of the World
Captain: Michael Sheen
Team: Will Ferrell, Gerard Butler, Mike Myers, James McAvoy, Patrick Kielty, Sergio Pizzorno, Gordon Ramsay, Woody Harrelson and Edward Norton.
Football legends: Edwin van der Sar, Roy Keane, Ruud Van Nistelrooy, Hernan Crespo and Jaap Stam.
Coached by Kenny Dalglish and Ian Rush.
Tickets are now on sale for Soccer Aid 2012. Call 0161 444 2012 or visit itv.com/socceraid.