Hotel behemoth Marriott International is becoming even larger, taking over rival chain Starwood in a $12.2 billion deal that will catapult it to become the world's largest hotelier by a wide margin.

The stock-and-cash deal, if completed, will add 50 percent more rooms to Marriott's portfolio and give it more unique, design-focused hotels that appeal to younger travelers.

Gibson, Dunn and Crutcher advised Marriott with a team led by co-chair of the M&A practice group and Washington-based partner Stephen Glover, and includes corporate partner Jonathan Corsico, of counsel Alisa Babitz and associate Alexander Orr; California corporate of counsel Andrew Hirsch and New York corporate associates Saee Muzumdar and Quinton Farrar.