We've officially turned on the theme song to Welcome Back, Kotter and started growing a lustrous mustache in honor of Phil Harrison's return to Game Industry Executiveland. This morning, reports from Europe indicated that Harrison would head to Microsoft -- Microsoft confirmed the news later, which named him corporate vice president of Interactive Entertainment Business "with an emphasis on growing the division's European business."

Microsoft corporate vice president of Studios Phil Spencer welcomed Harrison in a press release. "We are honored to have Phil join a team that boasts a wealth of talent from across the industry," Spencer said. Harrison is charged with "overseeing UK-based developers Lionhead Studios, Soho Productions and Rare Ltd.," a role he'll likely warm to quickly given past work as head of worldwide studios for Sony Computer Entertainment.

Harrison's most recent employer is game industry venture capital firm London Venture Partners, where he served as general partner. He continues on as "special advisor." Harrison will not be replacing former Microsoft Studios Europe head Peter Molyneux (who recently left Microsoft), though he will be overseeing Lionhead. Molyneux's role at Lionhead as studio manager is currently occupied by COO Mark Webley, according to Microsoft.

Update: Microsoft announced Harrison's appointment this morning to corporate vice president of Microsoft's "Interactive Entertainment Business" arm, with a focus on European markets. See the full presser just below the jump.

[Image credit: Flickr user 'jontintinjordan']