While not about long-term cohabitation, this massively successful comedy kicks off with four friends sharing a luxury hotel suite in Las Vegas for a bachelor party that goes spectacularly wrong. Waking up with no memory of the previous night, a missing groom, and a tiger in the bathroom, the remaining trio must retrace their steps through the chaotic aftermath.

The shared (and trashed) hotel suite becomes the central hub for their investigation into the night's debauchery. The dynamic between the three leads – Bradley Cooper, Ed Helms, and Zach Galifianakis – is the heart of the film, fueled by their shared predicament and the need to piece together what happened within the confines of their temporary dwelling and the city beyond. It's a wild, laugh-out-loud adventure about friendship and surviving the consequences of a shared, epic night.

This beloved family comedy is a fantastic showcase for young Lindsay Lohan playing dual roles as identical twins Annie and Hallie, separated at birth and raised on different continents after their parents' divorce. They meet by chance at a summer camp and, after discovering their connection, hatch a plan to swap places and get their parents back together.

Their scheme involves one twin living with the father she's never known in California, and the other living with the mother she's never known in London. While not traditional roommates, they are forced to inhabit a new home environment with a parent and staff they don't know, navigating the challenges of fitting in and keeping their secret. The film is a charming remake of the 1961 classic and features a wonderful supporting cast, including Dennis Quaid and Natasha Richardson.

What if you could escape your life and live in someone else's home across the world for two weeks? That's the delightful concept behind this cross-continental rom-com. Amanda (Cameron Diaz), a busy movie trailer producer in LA, and Iris (Kate Winslet), a journalist in a quaint English village, swap homes for the Christmas holidays after bad experiences with men.

They don't become roommates in the traditional sense, but they fully inhabit each other's living spaces, experiencing life (and meeting potential love interests!) through the lens of someone else's dwelling. Directed by Nancy Meyers, known for her cozy and aspirational interiors, the film beautifully contrasts the sunny California mansion with the picturesque English cottage. It's a lovely story about finding yourself and love in unexpected places, literally, by living in someone else's shoes... or house!

Imagine being forced to pretend you're engaged to your assistant to avoid deportation, and then having to spend a weekend with his eccentric family in Alaska, sharing a room no less! That's the premise of this charming rom-com starring Sandra Bullock as a high-powered book editor and Ryan Reynolds as her long-suffering assistant.

The 'forced proximity' trope is in full effect here, creating plenty of comedic friction and unexpected tenderness as the two leads navigate their elaborate ruse. Betty White steals scenes as Reynolds' grandmother, adding an extra layer of hilarious chaos. It's a sweet and funny take on two people who can barely tolerate each other being forced to share not just a secret, but also a very confined living space.

This isn't your typical romantic comedy; it's more of an anti-rom-com that delves into the awkward, painful, and sometimes darkly funny reality of a relationship ending when the couple still lives together. Vince Vaughn and Jennifer Aniston play Gary and Brooke, who decide to break up but, due to their shared condo and refusal to move out, are forced into an uncomfortable cohabitation situation.

The film doesn't shy away from the passive-aggression, the fights, and the sheer absurdity of trying to navigate a separation while sharing a bathroom. It offers a refreshingly honest, albeit often uncomfortable, look at the messy aftermath of a relationship and the challenges of sharing a space when you can't stand each other.

What happens when two middle-aged men who still live at home suddenly become step-brothers and are forced to share a bedroom? Pure, unadulterated comedic chaos, that's what! Will Ferrell and John C. Reilly are comedy gold as Brennan Huff and Dale Doback, two overgrown children thrust together when their single parents (Mary Steenburgen and Richard Jenkins) fall in love and marry.

Their initial rivalry gives way to an unlikely bond over ridiculous antics, shared interests like Prestige Worldwide, and a mutual disdain for authority. Directed by Adam McKay, this film is a masterclass in absurdist humor and features some of the most quotable lines in modern comedy. It's a hilarious exploration of arrested development and the bizarre dynamics of a newly blended family sharing a roof.

Taking the 'roommate gone wrong' premise to a modern college setting, this thriller follows Sara (Minka Kelly), a freshman starting university in Los Angeles. She's paired with Rebecca (Leighton Meester), who initially seems friendly but soon reveals a deeply troubled and possessive nature. Rebecca's fixation on Sara escalates from creepy imitation to outright dangerous stalking and manipulation, isolating Sara from new friends and even her boyfriend.

The film taps into the anxieties of moving to a new place and living with a stranger, amplifying those fears into a suspenseful narrative. Leighton Meester delivers a chilling performance as the increasingly unstable roommate, making the shared dorm room feel like a cage. It's a tense ride that makes you appreciate having a normal roommate!

This psychological thriller will have you double-checking your locks and vetting potential roommates very carefully! Bridget Fonda plays a young woman who advertises for a roommate after a breakup. Along comes Hedra (Jennifer Jason Leigh), who seems perfect at first. However, Hedra quickly develops a dangerous obsession with her new living partner, beginning to imitate her appearance and behavior in increasingly disturbing ways.

Directed by Barbet Schroeder, the film masterfully builds tension and paranoia within the confines of a seemingly normal apartment. Leigh's performance is particularly chilling, creating a character who is both fragile and terrifyingly possessive. It's a gripping look at the dark side of shared living spaces when boundaries disappear and obsession takes hold.

Get ready for a comedic masterclass! This absolute classic brings together the legendary pairing of Jack Lemmon and Walter Matthau as two polar opposite divorced men who, out of necessity, become roommates. Felix Ungar (Lemmon) is a fastidious, neurotic neat freak, while Oscar Madison (Matthau) is a slovenly, laid-back sportswriter. Their forced cohabitation is a constant source of hilarious conflict, highlighting the timeless clash between order and chaos.

The film is based on Neil Simon's hugely successful 1965 play, which also spawned a beloved television series. Matthau won the Academy Award for Best Supporting Actor for playing Oscar in the film version, cementing this duo's place in comedy history. It's a pitch-perfect exploration of mismatched personalities trying to share a living space, and it's guaranteed to make you laugh out loud!