Cosmo Brown/Don Lockwood/Kathy Selden

Moresome · Ship · Pairing
Relationship:	Cosmo Brown / Don Lockwood / Kathy Selden
Alternative name(s):
Gender category:	f/m/m triad
Fandom:	Singin' in the Rain
Canonical?:	Don/Kathy is canon Cosmo & Don are best friends from childhood Cosmo & Kathy get along well in canon
Prevalence:	popular
Archives:
Other:	Don Lockwood/Kathy Selden, Cosmo Brown/Don Lockwood, Cosmo Brown/Kathy Selden
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Cosmo Brown/Don Lockwood/Kathy Selden is the classic OT3 of Singin' in the Rain.

Watched Singing In The Rain tonight for the first time and no one can convince me that Don, Kathy, and Cosmo weren’t a poly couple.

– jgnico

Fandom

Cosmo, Kathy and Don resting together in a sofa by quince (2022)

The three's polyamorous relationship is a reflection of the primary involvement between Cosmo and Don, who have been great friends since childhood with a remarkable connection -- where one is, the other will also be. Upon meeting Kathy by chance, Don falls in love and as the three work together their relationship grows closer, with a specific scene where Kathy kisses Don and Cosmo on the lips. In addition to countless interactions where they do everything as a threesome.

They are such an OT3!!!!! Like, don’t get me wrong, Don/Cosmo is my lifeblood, but Don/Cosmo/Kathy????? Is also so good. Especially during/after the “Good Morning” number. 😍

– impishtubist

The concept of the three being a triad has long permeated within the Singin' un the Rain fandom, often causing fans to believe they were alone in shipping this ot3.

[triflesandparsnips]
Singin’ in the Rain = A++ POLY PROMOTIONAL MATERIAL

[earisparticipates]
In my head, the guys were always attracted to each other, but never did anything about it until she showed up and was just like ‘we’re all sleeping together now, but first we must write a musical.’

[bemusedlybespectacled]
I am SO GLAD I’m not the only one who ships it

[burntcopper]
I’m of the opinion that Don and Cosmo were the worst kept secret in Hollywood - hence why all the publicity the studio was pushing about Don and Lena. Kathy comes along, Cosmo’s jealous for a bit, then it’s ‘sod it, she’s just too cute. the bed is totally big enough’.

[impishtubist]
Okay, BUT WHERE IS THE FIC?

Example Fanworks

Fics

• the road from hollywood by Butterfly for polyship week 2023, when Don and Cosmo decide to take Kathy to see where they grew up (2023)
• Bésame Mucho by Udaberri for the Year of the OTP January, telling us about each of their first kisses (2023)
• On The Railroad by punkrockgrantaire If he used the magic of cinema to ask Kathy out, why not do the same with Cosmo? (2016)
• Who Could Ask For Anything More by nahnahnahnah retells Singin' in the Rain from Cosmo's point of view, including many missing scenes concerning the love story of the triad. (2016)
• Or, What You Will by ryfkah. Monumental Pictures puts on Twelfth Night. It's wonderfully ambisexterous. (2016)
• Kiss Us If You Miss Us by HugeAlienPie is a Triad Verse fic set some time after Singin' in the Rain, and includes several fun film and song titles from a universe where poly trios are the norm. (2015)
• And Write That Symphony by cimorene a tale about how they fell in love (2002)

Fanart

• Good Morning, a new OT3 acquired by pufferfishartblogorsth (2023)
• Just them singin in the early morning by munchkinmanchkin (2022)
• honey it’s june 14th time for another bunch of wholesomeness by munchkinmanchkin (2022)

Meme

• This is my boyfriend, and this is his boyfriend by sashaforthewin (2021)
• "This is a callout post for classic Hollywood" by partywithponies (2020)

Meta

• Anyway Singing In The Rain is gay and poly as hell and I have the #receipts, a long meta/picspam by punkrockgrantaire formely punkrockdorianpavus (Nov. 2016)

Podcast

• March 2014: Into the TriadVerse, a podcast by thisweekinfandomhistory with pterawaters response (can be read here) (2023)

Archives & Fannish Links

• Cosmo Brown/Don Lockwood/Kathy Selden on AO3