I Feel Pretty may look like a one woman show starring Amy Schumer, but the movie features another in a long line of incredible supporting performances from Michelle Williams.

I Feel Pretty follows Renee’s journey after a head injury absolves her of her insecurities, allowing her to believe for the first time in her life that she is exceptionally, conventionally beautiful. This change imbues in her a sort of confidence that allows her to chase her dreams and conquer her fears.

Renee works for a cosmetics company where Avery LeClaire, played by Michelle Williams, runs the business. Renee begins the film working for the company’s internet division out of a basement in Chinatown, but later fills an open receptionist position at the company, putting her closer to Avery. Her proximity to Avery combined with her newfound confidence leads her to new and unforeseen success.

Avery brings a fantastic comedic dynamic to the film that is distinctly different from Renee’s character. This is Michelle Williams as we have never seen her; she is bubbly and bright, campy and goofy, vacillating between daft and quick-witted, all the while emanating a sense of refined control. Avery speaks with an affected, high-pitched voice that turns everything she says into a punchline.

The novelty of Williams’ performance, not just within the film but within her career as a whole, will no doubt grab your attention. However, her performance is more than just novelty — it’s a bold choice that enhances the film’s comedy and provides a much needed balance to joke that propels Renee’s story.

I Feel Pretty derives almost all of its humor from Renee believing her appearance magically changed. This change gives her the confidence to do and say things she otherwise would never have dared to. The movie leans hard into this rather flawed premise, putting Renee in situation after situation meant to emphasize how funny it is that she thinks she’s attractive. Although well-intentioned, Renee’s story feels bogged down by the inherent conceptual flaw of the story.

On the other hand, Michelle Williams’ performance as Avery LeClaire provides a far different brand of comedy not so entrenched in the film’s flaws. For much of the movie, Williams plays up Avery’s eccentricities, almost encouraging the audience to laugh at her. The first time we see her, Avery is quite literally prancing through the office. She turns “Kohls” into a three-syllable word. She speaks with delicate hand gestures akin to the movements of a butterfly.

While Avery may seem daft, as her relationship with Renee grows, she opens up and shares her own insecurity. She explains how her voice, a high-pitched breathy squeak, prevents her from being taken seriously as the face and leader of the company. The movie pulls off an impressive bait-and-switch with Avery’s voice: what begins as a funny joke evolves into a poignant reminder of how our physical characteristics can undermine our other characteristics.

Through Williams, the film tells the story of one woman’s struggle to accept her insecurity and overcome the negative impact it has on her and her life. Of course, this is meant to parallel Renee’s own journey, but at times, Avery’s story threatens to eclipse Renee’s — both because Avery is spared the logical fallacies embedded within the central plot and because Avery is forced to conquer her insecurity head on.

I Feel Pretty is a testament to Michelle Williams’ skill as a thespian, but also as a supporting actor. This is hardly the first time that Williams has stolen the spotlight with only a few minutes of screen time.

Williams’ career is full of standout performances that have made her one of the most compelling actresses working today. She seems to have a particular penchant for supporting performances — instilling minor or secondary characters with a unique richness and depth.

Most recently, Williams’ double-whammy of supporting performances in Certain Women and Manchester by the Sea in 2016, the latter of which landed her an Oscar nomination, are a testament to her skill in a supporting role.

While these performances are quite unlike her turn in I Feel Pretty, they exemplify her powerful combination of talent and skill.

In Manchester by the Sea, Williams plays the ex-wife to the film’s protagonist (Casey Affleck), still grieving the loss of her children in a house fire and attempting to reconcile her relationship with her husband. In one of the film’s most talked about moments, Williams runs into Affleck and seeks to offer him forgiveness and move forward from their tragic past. In this scene, Williams conveys the profound heartbreak and inner conflict she feels with a sublime realism.

In Certain Women, director Kelly Reichardt’s triptych of stories about women in the American Midwest, Williams plays a resolute and determined woman grappling with the individuals around her that doubt and undermine her. While Williams’ portion of the film is regarded in some circles as the weakest of the three, she delivers a phenomenal performance that captures the subtle nuance of the defeats and victories her character experiences.

Williams’ supporting performance in Ang Lee’s 2004 film Brokeback Mountain also earned her an Oscar nomination — another film that required her to use her skill to externalize her character’s internal struggle.

Her work in a variety of other films, including Shutter Island, I’m Not There, Wonderstruck, Synecdoche, New York, and Meek’s Cutoff, are all a testament to Williams’ skill as a supporting actress.

She always finds a way to steal the spotlight, if even just for a moment. She is an actress that understands the needs of her character and the film as a whole, acting as a perfect part of a film’s ensemble when the situation calls for it.

This is to say nothing of Michelle Williams’ leading roles, including two more Oscar nominations for Blue Valentine and My Week with Marilyn.

Michelle Williams may be a phenomenal supporting actress, but that’s really because she’s just an incredible actress period. I Feel Pretty shows off her range as an actress, proving that comedy is by no means out of reach for her.

With six projects currently announced or in development, including a Janis Joplin biopic and Luca Guadagnino’s thriller Rio, Michelle Williams isn’t going anywhere.

Let’s hope it stays that way.