April 17, 2012 08:30 PM

Jeff Kravitz/FilmMagic

The bloodline will continue.

Anna Paquin and Stephen Moyer are expecting their first child together this fall, the actress’s rep confirms to PEOPLE.

The True Blood costars met on the set of the hit HBO show and have been married since August 2010. Moyer has two children — Lilac, 10, and Billy, 12 — from a previous relationship.

Paquin, 29, who won an Oscar for The Piano when she was just 11, will return as Sookie and Moyer, 42, will be back as Bill for True Blood‘s fifth season, premiering June 10.

Entertainment Weekly was first to report the pregnancy news.

— Mike Fleeman and Julie Jordan

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