10 actors who completely transformed themselves for roles this year

The transformation took 6.5 hours with the work of five makeup artists, according to USA Today.

"You set your mind to just accept it," he said of sitting in the makeup chair. "Don't panic and sit still, watch the experts paint every vein by hand. It's quite fascinating."

Chastain covered herself with the dark bronzer and thick foundation characteristic of Tammy's late-'90s style.

Chastain "freaked out" when she saw herself in full hair and makeup during the first screen test, she told The Los Angeles Times in August.

"I was like, 'I don't know how to act like this.' People think it's easier, but it's not. You have to reach through the makeup — you can't let the makeup be the performance," she said.

"It was a pretty significant transformation," Day told Vogue of becoming Holiday.

"To be honest with myself, it is not great to say, I did starve myself a lot when I was on set," Day told Entertainment Tonight in February. "I am fast and Billie is like molasses. So cigarettes slowed me down, alcohol slowed me down, starvation slowed me down, not sleeping slowed me down and I needed it."

Instead of prosthetics, Gaga's creative team relied on permed wigs and makeup to help age the star.

"She said, 'I don't want to see Gaga on screen,'" Gaga's hair stylist Frederic Aspiras told Variety in November. "It sounds easy, but it wasn't. It was ultimately about the slightest nuances."

"There were murals and murals of Patrizia and all of her looks over the years, but what was really important to me was that her heart shined through ... and that when you were watching this film and you saw her you weren't seeing her clothes, you were seeing her," she told InStyle in November.

"It was more important to me that Jared looked believable — we didn't get stuck too much on Paolo's look, because Jared has completely different bone structure," Leto's makeup artist Göran Lundström told The Hollywood Reporter. "I just tried to get the personality of Paolo in there."

Among his previous transformations, he gained almost 70 pounds to play Mark David Chapman, the man who killed John Lennon, for "Chapter 27" in 2008, and he lost 40 pounds to play an HIV-positive transgender woman, Rayon, in "Dallas Buyers Club" in 2013. The role, while deemed a controversial casting decision by some, won him an Academy Award.

"When you make that kind of commitment, there's something that happens. You're compelled to dig even deeper, to work even harder, to discover something more rewarding and richer," he told Entertainment Weekly in November.

It took Paulson around 3.5 hours to transform into Tripp on set.

Paulson gained 30 pounds to play Tripp, but she garnered criticism for also wearing an extra 4.5 pounds of padding. She told The Los Angeles Times in August that it's "very hard for" her to talk about wearing a fat suit "without feeling like I'm making excuses," adding that she thinks the controversy over her wearing extra padding is "legitimate."

"I think fat phobia is real," she told the publication. "I think to pretend otherwise causes further harm. And it is a very important conversation to be had."

Ashford told Glamour that it took her three hours to get into hair and makeup to play Jones.

"What's really fascinating is that even though her hair changed and she got braces and had a nose job, she always had the same mascara and eyeliner," Ashford told Glamour. "I felt like her eye makeup grounded her in this kind of sweet, special way, and her accent and her cadence and the timbre of her voice also really stayed kind of consistent through all those years. Those were things that I focused on."

Farmiga played a younger version of Tony Soprano's mother, Livia, a role originated by Nancy Marchand.

"I asked if I could tweak my face with minimal prosthetics to honor the incredible, beautiful, angular bone structure that supported Livia's angular, aggressive, sharp traits," Farmiga told Rolling Stone. "Livia is a character that has many, many sharp angles, and very few curves."

"I would not have been able to do this if I didn't have a full year with the best trainers and nutritionists paid for by the biggest studio in the world," Nanjiani wrote on Instagram when he revealed his transformation for filming in 2019. He added, "It would have been impossible without these resources and time."

The film was finally released this year.

"If I'm playing the first South Asian superhero, I want to look like someone who can take on Thor or Captain America, or any of those people," he told USA Today in October. "I was like, I want this to be believable. I want to feel that kind of powerful in this role."

"I wanted the character to be the opposite of a lot of the stereotypical depictions we've seen of brown dudes in American pop culture," Nanjiani told USA Today of playing Kingo. "I don't get to play characters who are cool. And this guy is a little bit cool."

"I took a photo of Emma the first time we did the full Cruella look — the full make-up, nails, and the wig," Nadia Stacey, the film's hair and makeup designer, told Elle. "When you look at it you can see this naughtiness, almost evil, in her eyes. She just became Cruella straight away."

"I really loved it," she told the outlet. "I also loved that she's kind of embracing her nature, the story of nature versus nurture a little bit. The duality of those characters was really, really fun. And it made playing Cruella even more fun because she gets to really lean into that and in a way she gets to act as Cruella ... She finally really is that person. There are a lot of really interesting layers to her."