Jennifer Garner has a new hubby. TV hubby, that is.

David Tennant has been cast to play opposite Garner as the male lead in “Camping,”  HBO’s new eight-episode, straight-to-series comedy from “Girls” creator Lena Dunham and fellow showrunner Jenni Konner.

“Camping” centers around the story of Walt’s 45th birthday, which was supposed to be a delightful weekend back to nature, at least according to his obsessively organized, and aggressively controlling wife Kathryn. But when the camping trip gathers Kathryn’s meek sister, holier than thou ex-best friend and a free-spirited Tagalong in one place, it becomes a weekend of tested marriages and woman on woman crime that won’t soon be forgotten. Plus, bears.

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Tennant — best-known for playing the Tenth Doctor on the long-running British series “Doctor Who” and Alec Hardy on “Broadchurch” — will take on the role of Walt, an obedient husband and a loving father, the reliable lynchpin of his male social group, but below that reality lurks a subtle but growing discontent about what he’s just signed up for

Garner stars as Kathryn, a controlling L.A. mom who is far less cheerful than her Lululemons imply. Kathryn controls the proceedings with an iron grip until she’s faced with a woman who undoes all of her best-laid plans.

The limited series is based on a British show of the same name, created by Julia Davis and produced by Baby Cow Productions. The premium cable network’s project begins production this spring.

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Dunham and Konner will both write and executive produce for A Casual Romance. Davis is also executive producing under Hush Ho, with Christine Langan for Baby Cow, Tom Lassally for 3 Arts Entertainment, and Ilene S. Landress.