Hayden Christensen's 7-year-old daughter was his 'lightsaber training partner' for his role in 'Obi-Wan Kenobi'

• Hayden Christensen appeared on "The Tonight Show Starring Jimmy Fallon" on Friday.
• Christensen, 41, said his daughter Briar Rose helped him prepare for "Obi-Wan Kenobi."

Hayden Christensen revealed how his 7-year-old daughter helped him prepare for his role in "Obi-Wan Kenobi."

Christensen appeared on "The Tonight Show Starring Jimmy Fallon" on Friday to discuss the new Disney+ miniseries, "Obi-Wan Kenobi." The series is part of the "Star Wars" franchise and features Christensen reprising his role as Anakin Skywalker, a.k.a. Darth Vader, after 17 years.

During the interview, Fallon asked Christensen if his daughter, Briar Rose, had a lightsaber.

"We have a couple of lightsabers kicking around the house. Actually, she was my first lightsaber training partner when I came back to the 'Obi-Wan' show," Christensen said.

Fallon also asked if Briar Rose knew her father was Darth Vader.

"She knows daddy is Darth Vader. She's never seen daddy as Darth Vader," Christensen said. "I'm still waiting a little bit until that happens."

Christensen added that he might show his daughter the "Star Wars" prequels, but said, "there are some scenes we might have to fast forward through."

Christensen shares Briar Rose with actress Rachel Bilson. People reported that the former couple broke up in 2017, ending their nine-year engagement.

"Obi-Wan Kenobi" premiered on May 27 and the finale aired on June 22. Christensen's costar Ewan McGregor also returned to the series to play Obi-Wan Kenobi after 17 years.

In May, director Deborah Chow said she pushed for Christensen to return as Darth Vader during a roundtable interview attended by Insider's Ayomikun Adekaiyero.

"Obviously, we're very connected to the prequels, and we're very strongly connected to 'Revenge of the Sith' in particular," Chow said. "It just felt very organic and it felt like we really needed Hayden back in this story, particularly in relation to Obi-Wan. So I went and met with him when we were still in development and explained the series and explained what we were trying to do."

Ahead of the finale, McGregor told GQ that fans send him homoerotic fan art of him and Christensen.

"There's a lot of homoerotic Obi-Wan/Hayden fan art that gets sent to me now and again," he said. "I don't know how it finds me. It's always a bit of an eyeopener."

McGregor continued: "You open the envelope, you think you're going to have to sign something, and you're like, 'Fucking hell!'"