The star of X-Men and Filth is a lifelong Hoops fan and will lead the line of non-footballers at the showcase on May 28.
“I have played at Celtic Park just the once," he told celticfc.net.
"That alone would have been a dream come true but to stand on the pitch again, never mind play there, is a supreme privilege.”
Former Bhoys greats Moravcik and Larsson will captain the two sides for a match in aid of the Celtic Foundation in the 50th anniversary year of the Lisbon Lions' European Cup triumph.
"They (Larsson and Moravcik) came in unheralded and became two of our finest who could have played anywhere and for anyone," said McAvoy.
"They also proved, along with Neil Lennon, to be my favourite players.
“It's the same as acting, to be honest. You could let nerves get the better of you but then you wouldn’t enjoy it.
“As long as you're not trying to look cool or be the best, you can enjoy it for what it is. That is, a guy who cannae play getting to play at Paradise. It’s win, win.
“The Lions are a statement of local determination and a monument to local talent,” he continued.
“Who knows when we'll see that kind of group dynamic again. We'll always be the first British team to win it. It’s a gift we can always be proud of.”
Fellow actors and Celtic fans Marton Compston, Ross McCall, Gianni Capaldi, Gerard Miller and Tony Curran will also feature in the end of season event.
That is in addition to Larsson, Moravcik and 18 more former Hoops players including the likes of Stiliyan Petrov, Neil Lennon, John Hartson and Artur Boruc.
Proceeds from the match will go towards local and dementia projects as well as to building 67 kitchens in third world countries.
More than 53,000 tickets have already been sold and more are available on general sale at the price of £12 for adults and £6 for concessions.