The exclusive Oscar nominees luncheon on Monday was likely the last time the "class of 2016" will be in the same room before the Academy Awards Feb. 28.

The annual event held at the Beverly Hilton Hotel in Hollywood toasts the nominated actors, filmmakers and crews behind some of the year's biggest films.

Room, about a mother and her son living in captivity, is one of the nominated movies. Brie Larson, who has already won a Golden Globe, Critics' Choice award and a SAG award for her role in the film, couldn't talk enough about her young Canadian co-star, Jacob Tremblay.

"The perception of the world, that innocence, that humour, that light he brings to the movie is the same thing he brings to every second of his actual life," she said about the nine-year-old Vancouver native.

Room's Brie Larson can't say enough about her young Canadian co-star Jacob Tremblay0:47

"I'm constantly with this child who has this very easy way of looking at things and doesn't feel the bigger picture of it. He's just really excited about the present moment."

The other films nominated for best picture are: 

  • The Big Short. 
  • Bridge of Spies. 
  • Brooklyn. 
  • Mad Max: Fury Road. 
  • The Martian.
  • The Revenant.
  • Spotlight.

Canadian Rachel McAdams is nominated for a supporting role in Spotlight, based on the true story about a child abuse sex scandal in the Catholic archdiocese of Boston. She gave credit to the real-life Boston Globe investigative journalist she played in the film, Sacha Pfeiffer, whom she relied on for pointers.

"I just got to step into those shoes," she said about Pfeiffer. "I owe this nomination to her entirely and I hope that we continue to tell the stories of great women out there."

Oscar-nominated Rooney Mara on why awards season is like the "birthday" that never ends0:23

With no acting nominees of colour for two years in a row, the lack of diversity at this year's Oscars, which triggered the social media hashtag #OscarsSoWhite when the nominations were first announced Jan.14, has been a continuing discussion.

Sylvester Stallone, nominated for best supporting actor in the film Creed, said he felt the star of the Rocky spinoff film, Michael B. Jordan, "should have been given a lot more respect, a lot more attention."

Stallone said he asked filmmaker Ryan Coogler whether he should go to the awards after receiving the nomination, but in the end, he said, Coogler encouraged him to represent the film.

"I do believe things will change. It's just a matter of time. Eventually, all talent will rise to the top."

There are fewer reporters invited to this luncheon than to other awards season events and the smaller venue makes it feel more casual than the formal awards. Sometimes, it allows the stars to be a little more candid.

"It's a huge honour and it's such a great way to celebrate all of our films," said supporting actress nominee Rooney Mara about her film Carol and the recognition it has received this awards season.

"But then on the other hand it can be very overwhelming, and sometimes it feels like we've been celebrating the same person's birthday for months on end and it's just never going to stop. Sometimes it can feel a little bit much, like I want the birthday party to end."