The How I Met Your Mother star and Alexis Denisof will welcome their first child this spring

Actress Alyson Hannigan is pregnant, her rep Megan Moss tells PEOPLE exclusively.

The How I Met Your Mother star, 34, and her husband, actor Alexis Denisof, 42, will welcome their first child this spring.

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The couple met on the set of Buffy the Vampire Slayer during the 1999-2000 season and were married at the Two Bunch Palms resort near Palm Springs, Calif., on Oct. 11, 2003.