Johnny Depp​ says if his wife Amber Heard is jailed over their dogs' quarantine fracas, he would "assault" Barnaby Joyce.

Speaking to TV host Jimmy Kimmel on Jimmy Kimmel Live, Depp said this would allow him to join Heard, his wife, in prison.

Johnny Depp on Jimmy Kimmel Live. Credit:ABC Network

"I'd just fly to Australia and assault that man," he says. "So that I could go to jail."

Heard has been ordered to face a Gold Coast court on November 2 on charges of illegally bringing Pistol and Boo into Australia in May. She could face up to 10 years jail time and a fine of $100,000 if found guilty.