Kristen Bell and her fiance Dax Shepard are aiming to "get into the petting zoo business."

The pair have been together since 2007 and are definitely planning on having children together one day.

The Hollywood couple will leave show business behind once they've got little tots running around.

"We'd love to get out of the film and TV business and get into the petting zoo business," Dax joked to People magazine in a joint interview with Kristen.

Kristen isn't keen on leaving entertainment behind entirely.

"We're actors now, but once we procreate, we'll become a circus," she laughed.

Kristen and Dax are committed to getting wed, but they are holding off on their big day until homosexuals are formally given the right to marry in the United States.

"[We'll walk down the aisle] once they legalise marriage for everyone," Kristen explained.

Dax and Kristen will host an intimate nuptial ceremony.

"[Big weddings] are not our jam," Dax said.

"Ours will just be a small orgy with family and friends."