To those who knewAnton Yelchinbest, theStar Trekstar was a playful “explorer” who lived life to its fullest.

The actor’s playful personality and intellectual curiosity is on display in the newdocumentaryLove, Antosha, which sheds light on the actor’s private life through interviews and home videos. It also reveals that Yelchin was living with cystic fibrosis, which he hadn’t yet shared publicly.

“He was going to come out and talk about it with the world,” says friend and former band mate David Glowacki.

To celebrate the release ofLove, Antosha, Yelchin’s famous costars shared with PEOPLE their memories of a “bright” young talent gone too soon.

Anton Yelchin, Jennifer Lawrence and Jodie Foster on the set of 2011’sThe Beaver.Icon/Kobal/Shutterstock

The Beaver - 2011

For more on Anton Yelchin and those who celebrate his memory inLove, Antosha, pick up the latest issue of PEOPLE on newsstands Friday

Jodie Foster, directed Yelchin in 2011’sThe Beaver

“I loved his enthusiasm and how much fun he was. He andJennifer Lawrencewere very close and never stopped laughing. It was like witnessing teenagers ribbing each other, running around playing tag and talking with food in their mouths and having it dribble out. I just remember sitting at lunch with them and just laughing hysterically.

“I had a dream about him a very short period of time after he died, but it wasn’t really a dream. It doesn’t happen to me often, my mother-in-law had died as well, and the two of them were having a conversation. Anton had his curly hair and he was just rapid fire, telling a story. He was kind of fidgeting the way he fidgeted when he told stories, and giggling. That kind of sums up that memory that I have. It really felt like more of a memory than a dream.”

Willam Dafoe, costar in 2014’sOdd Thomas

“We became very good friends very quickly. I liked his attitude and his intellectual curiosity. We kept in touch with each other and very time he was in New York, he’d give me a call and I’d kind of do the same thing when I was in L.A., so even though there’s a big age difference between us, we got along very well and I loved talking with him.”

Bryce Dallas Howard, costar in 2009’sTerminator: Salvation

Paramount Pictures/Bad Robot/Kobal/Shutterstock

Star Trek

Chris Pinecostar in threeStar Trekmovies

“He was an explorer, just interested in life. It was intense curiosity. Hindsight is everything. I don’t know if it’s because maybe he knew he didn’t have long, but he was ferociously invested in life. He wanted to eat it up and gobble it up whether it was an art or photography, music, his relationship with his parents, his relationship with his closest friends, traveling, reading and writing. He dove in head first and I think [that mind-set] is a good reminder to be grateful and curious and get off your ass and explore.”

Simon Pegg, costar in threeStar Trekmovies

J.J. Abrams, directed Yelchin in 2009’sStar Trekand 2013’sInto Darkness

Love, Antoshais now playing in theaters.

source: people.com