EntertainmentJohn Travolta Praises Olivia Newton-John Amid Cancer Battle: 'I'm Very Proud of Her' (Exclusive)

The celebrated star walked the red carpet at the premiere of his new film, The Fanatic, at the Egyptian Theatre in Hollywood on Thursday, and he stopped to talk with ET where he had nothing but praise for his beloved Grease co-star.

"She looks incredible," Travolta, 65, marveled. "She doesn't look any different than [she did] years ago, and I'm very proud of her."

"I'm very happy about Olivia," the actor added with a smile.

Newton-John, 70, sat down with 60 Minutes Australia, in an emotional interview that aired earlier this month, where she opened up about her latest battle with cancer and explained that she's working hard to enjoy life to the fullest.

Olivia Newton-John Is 'Thriving' While Facing Cancer Again — and Still Trying to Make a Difference

Olivia Newton-John Is 'Thriving' While Facing Cancer

John also praised Olivia for her strength amid her battle with cancer . Ever since John Travolta Olivia Newton - John and John Travolta attend the 40th anniversary screening of Grease together in Of course, both John and Olivia have been very busy in recent months. John has already had

" I ' m very proud of her ," Travolta told ET, "and very happy about Olivia ." Olivia Newton - John 'had to learn to walk again' amid stage 4 breast cancer battle . The actress/singer is battling cancer for the third time. In 1992, she was diagnosed with breast cancer . After a car accident in 2013, doctors found

ET spoke with Newton-John last week, and the actress shared, "I just want everyone to know, I'm here, I'm doing great. I'm doing really well and I'm really healthy."

Travolta and Newton-John have long been close friends and fans of one another -- but in Travolta's new film, The Fanatic, the actor shows a different, darker side of fandom.

In the movie, Travolta plays a man named Moose who is obsessed with an actor and increasingly begins to encroach on the star's space. The role required something of a radical transformation that included a bizarre, bowl-cut hairstyle and a truly strange overall look.

"I found on the internet this guy that had that haircut and rimless glasses and I superimposed it on a photograph [of me] and I sent it to [director] Fred Durst, and he fell in love with the look," Travolta explained. "Then we added the Hawaiian shirt and the shorts and it just came together, [as] kismet, you know?"

French 'spiderman' climbs HK tower, hoists reconciliation flag amid mass protests

French "spiderman" climber Alain Robert scaled a 68-storey skyscraper in Hong Kong on Friday to hoist a flag symbolizing reconciliation between China and the territory as weeks of escalating pro-democracy protests show no signs of abating. Using his bare hands and without a harness, Robert clambered up Cheung Kong Center located in the central business district and secured a large banner on the building's exterior. The sign positioned China's flag in the left hand corner with Hong Kong's flag on the right side. Underneath was a yellow hand shaking a red hand on a white background to signify peace.

John Travolta Praises Olivia Newton - John Amid Cancer Battle . John Travolta Is A Terrifyingly Creepy Stalker In 'The Fanatic,' Directed By Fred Back in August, she sat down with "60 Minutes Australia" and revealed that her cancer is back and more aggressive than ever. " I ' m so lucky that I've

John Travolta Says He’s ‘ Very Proud ’ of Grease Costar Olivia Newton - John as She Faces Cancer . ‘It’s something I ’ m living with,” the singer said on 60 Minutes Australia. “I see it as something in my body I ’ m getting rid of. I don’t talk about a battle or a war, because I think that sets up that kind

Travolta said that, when it comes to dedicated fans, he's had some good experiences and he even knows exactly who his biggest fan really is.

"My number one fan in the world is Sharon Travolta," the actor said, referring to a devoted admirer who lives in England and who's been a follower of the actor's work for decades. "She changed her name to my name out of love 40 years ago and on her birthday she watches every movie [of mine] 24/7, and that's kind of her gift to herself and me on her birthday."

The actors' die-hard devotee will soon have another movie to add to her list with The Fanatic, which hits theaters Aug. 30.