Phoebe Buffay is one of the six main characters from the American television sitcom Friends. She was created by David Crane and Marta Kauffman and portrayed by actress Lisa Kudrow.

In the series' universe, Phoebe is the daughter of Frank and Lily Buffay. Her biological mother's name was Phoebe Abbott, whom she was named after. Phoebe has a twin sister, Ursula, a waitress who is also portrayed by Kudrow. Phoebe can speak several languages, including French and Italian. She appeared in all of the show's 236 episodes during its decade-long run, from its premiere on September 22, 1994, to its finale on May 6, 2004. She is a masseuse, notable for her offbeat and often unusual behavior. She was Monica Geller's roommate before Rachel Green, which is how she was introduced to the group. Phoebe is best friends with Monica and Rachel, along with their neighbors, Chandler Bing and Joey Tribbiani, and also Monica's brother Ross Geller. She plays acoustic guitar and sings simple, awkward songs at Central Perk, in addition to occasionally busking. During the show's ninth season, Phoebe is set up on a blind date with Mike Hannigan (played by actor Paul Rudd) and they marry in the final season.

Critical reception towards Phoebe remained consistently positive throughout Friends' decade-long run. Kudrow received critical acclaim for playing her character, including a Primetime Emmy Award, a Screen Actors Guild Award, a Satellite Award, an American Comedy Award and a TV Guide Award, as well as a Golden Globe Award nomination.

In the pilot episode, Phoebe is introduced as one of the six original friends, including her Greenwich Village Manhattan neighbors Joey (Matt LeBlanc) and Chandler (Matthew Perry), former roommate Monica (Courteney Cox), Rachel Green (Jennifer Aniston), and Monica's brother, Ross (David Schwimmer). She is a masseuse and part-time, aspiring folk-type musician, who plays a dreadnought style acoustic guitar and sings very awkward or absurd, self-composed songs. She has been shown busking in the subway, outside of the gang's usual "hang out" place, Central Perk, as well as at a public library, and has been seen frequently playing live sets inside the coffee shop. She had moved in with her maternal grandmother (Audra Lindley), upon moving out of Monica's apartment, approximately one year before the pilot episode, due to Monica's obsessive compulsive nature and anal-retentive cleaning habits. During the first season, she has myriad boyfriends, including Tony, a physicist named David, played by Hank Azaria, and a psychologist named Roger, played by Fisher Stevens. Phoebe works as a temporary secretary for Chandler for a brief period in "The One with the Big Ick Factor".

Phoebe's crass, identical twin sister, Ursula Buffay (also portrayed by Kudrow), a character created for and appearing in the American sitcom Mad About You as a waitress, is also introduced in the first season, in "The One with Two Parts". Phoebe is shown to have a very strained relationship with Ursula, who is one minute older than she and seems to care little about family affairs or Phoebe, Phoebe nearly always goes home empty-handed and none the wiser. When it is revealed Ursula performs in porn under Phoebe's name, Phoebe eventually finds some redemption by cashing in Ursula's pay slips. Phoebe's father, Frank Buffay, abandoned the family when Phoebe was a child, and the woman Phoebe believed was her mother, Lily Buffay, committed suicide when Phoebe was about 14, by means of carbon monoxide poisoning. However, Phoebe discovers she has a paternal half-brother Frank, Jr., and later meets her real mother Phoebe Abbott (Teri Garr), who had given her up for adoption when she and Ursula were born (with her, Frank, Sr. and Lily having been "kind of a couple").

In the second season episode, "The One with Phoebe's Husband", it is revealed that Phoebe was legally married to a "hoping to be gay" Canadian ice dancer, Duncan (Steve Zahn), for six years, to help him acquire his green card. The two divorce when he realizes that he is, in fact, heterosexual, and going to marry another woman. In "The One with the Baby on the Bus", Phoebe is temporarily replaced as the primary singer for Central Perk by a professional singer named Stephanie Schiffer, played by singer Chrissie Hynde. Phoebe's song "Smelly Cat" is introduced in the same episode. In "The One Where Eddie Moves In", a record company produces a full budget music video for the song, in which her voice is overdubbed by a much better singer; she turns down her record deal when she discovers the depth of the deception.

Although the facets of Phoebe's character are manifold and extremely complex, Phoebe can generally be classified as kind-hearted, but ditzy and whimsical. Due in no small part to her extremely traumatic childhood, Phoebe has developed a child-like naïveté in an attempt to shield herself from the world's evils. In addition to being a vegetarian and an avid tree hugger, she also displays a remarkable lack of experience with the "darker sides" of life. In "The One Where Old Yeller Dies", it is shown that her deceased mother Lily would turn off films before a tragic ending, including the death of Old Yeller or Bambi's mother being shot. It is also revealed that she was never told the truth about Santa Claus. This is made all the more prominent as one of the running jokes of the show is Phoebe's seemingly infinite criminal record. She repeatedly makes reference to her underworld connections and crimes committed while living "on the streets".

Much to the dismay of her friends (especially paleontologist Ross), Phoebe dabbles in trendy New Age ideas and superstitions throughout the series. She is convinced she can feel the presence of her dead grandmother in her old apartment, she senses the spirit of her mother in a lost cat, reads tea leaves, and dismisses Charles Darwin's theory of evolution as "too easy" in "The One Where Heckles Dies". Very in tune with her emotions and those of others, Phoebe sometimes serves as a rock to her friends. She especially shows a great deal of maternal instinct towards her younger brother Frank, despite the latter's lack of intelligence.