The Henricksons will have to do without Sarah soon, as Amanda Seyfried is set to leave the HBO series Big Love to focus on her burgeoning movie career.

“She’s been exploring her movie career for a couple of years now, and we’ve been giving her a lot of room to do that,” says Big Love creator Will Scheffer. “I know having a commitment to a show for six months definitely cuts into her ability to pursue that career.”

Seyfried, 24, has played Bill’s (Bill Paxton) eldest daughter Sarah with first wife Barb (Jeanne Tripplehorn) since Big Love’s 2006 debut. After Mamma Mia and Jennifer’s Body, she is set to appear in the forthcoming film version of A Woman of No Importance and Gary Winick’s Letters To Juliet, which she’s shooting in the Italian city of Verona.

Seyfried was supposed to play the lead in Zack Snyder’s new film Sucker Punch, but had to drop out due to scheduling conflicts with Big Love, who recently snagged its third straight Golden Globe nom for Best Drama Series, something that apparently is not enough for the young actress.

“She’s moving away,” confirms Scheffer, adding that Seyfried’s character, who’ll get married on the third episode, will bid adieu on this season’s eighth and penultimate installments. Her pregnancy arc last season, which ultimately ended in miscarriage then later a wedding proposal, was one of the season’s best. The question is, with her departure, who’ll step up to fill her shoes? Teeny? Cara Lynn?

Nevertheless, Sarah is still in attendance when Big Love returns to HBO January 10.