Released on 30 November 2022 through Warner Records as a single, it was later included on her extended play, Take Me Home, in February 2023.

A music video for the remix, directed by George and Frederick Buford, shows PinkPantheress and Ice Spice together in various locations throughout New York City.

[11][14][15] PinkPantheress based it on a real relationship with a man who "ended up being a liar after the song came out" and who she threatened to put a hex on.

[13] After Ice Spice posted the original version of "Boy's a Liar" on her Instagram story, PinkPantheress replied asking to collaborate, hoping to "culturally ... stamp this song into [2023]".

2" was released on 3 February 2023 through Parlophone, Elektra Records, and 3EE as the lead single of PinkPantheress's debut studio album Heaven Knows.

[3] In contrast with PinkPantheress's "timid fragility",[11] Ice Spice raps with a "raspy voice"[42] and a "collected, indifferent delivery"[43] about a deceitful lover who is already in a relationship.

2" was promoted by Warner by getting social media influencers, including livestreamers, to make reaction videos to the song.

[41] Two mannequins dressed as Ice Spice and PinkPantheress were also placed on a rooftop in Central London in front of graffiti reading "LIAR" in early March 2023 in promotion of the song; a group of TikTok users stole the mannequin of Ice Spice from the display later that month.

[48] PinkPantheress also performed "Boy's a Liar" during a critically derided set at South by Southwest in 2023.

2" "encapsulated everything PinkPantheress does best: sweet and salty minimalist pop with a deep emotional core at close listen", while LaTesha Harris praised it as "never overstay[ing] its welcome", calling Ice Spice's verse "hilarious".

2" had an "incredible" hook and a "stripped-down magic" that "easily outshines the rest of [Heaven Knows] despite being far simpler in every way"; Clash's Amrit Virdi called it "a wholesome and fun ending to the record".

[53][54] For Dork, Abigail Firth wrote that adding the song to the end of the album was "unnecessary" and "the only part of Heaven Knows that feels like an afterthought".

[11][56] Complex's Joe Price wrote that "Ice Spice effortlessly blends into the track on the remix" and Stereogum's Tom Breihan wrote that the song "works" and that there was "something really fun about the idea of PinkPantheress and Ice Spice making music together".

2" "serves as a bridge between the hack-iness of sped-up trend hopping and genuine artistic needle-pushing".

[60] Rolling Stone, Vulture, The Week, and American Songwriter considered the absence of "Boy's a Liar Pt.