Lauren Graham has joined the cast of “Guys and Dolls,” playing nightclub chanteuse Miss Adelaide in the spring revival.Graham (“Gilmore Girls”), making her Rialto debut in the role, will star opposite Oliver Platt as small-time crook Nathan Detroit. Production’s two other major parts — high-roller Sky and upright Sarah — remain to be cast. Graham last appeared onstage in a 2002 production of “Once in a Lifetime” at the Williamstown Theater Fest. Des McAnuff (“Jersey Boys”) helms “Guys,” produced by Howard Panter for Ambassador Theater Group, Tulchin/Bartner and Darren Bagert. Show begins previews Feb. 3 ahead of a March 1 opening at the Nederlander Theater.