Greg Allen / Invision/AP 1 / 6
Greg Allen / Invision/AP 1 / 6

He's hitched! Cheyenne Jackson wed his fiance Jason Landau in an outdoor wedding in Los Angele's Encino area on Saturday, Sept. 13, Us Weekly can confirm.

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The "30 Rock" alum and Broadway veteran, 39, and Landau were feted by famous pals like Leah Remini, Rebecca Romijn and husband Jerry O'Connell, Alicia Silverstone, Jane Lynch and Kenneth Cole. The couple's dog named Billie Jean played a special role in the ceremony and walked down the aisle.

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"They are so good for each other and make each other extremely happy," an insider previously told Us of the twosome.

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Us broke news in February that the couple had gotten engaged six months after Jackson -- who came out as gay in 2005 -- ended his 13-year relationship with husband Monte Lapka. They first went public with their relationship in October 2013.

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The newlyweds will next celebrate on a tropical honeymoon.