Heather Mosby

	Heather Mosby
	Portrayed by: Erin Cahill
	First appearance: Little Minnesota
	Home town: Shaker Heights, Ohio
	Romances: ex-husband
	Gallery of Heather Mosby images (2)

Heather Mosby is Ted's younger sister and daughter of Alfred and Virginia Mosby.

Ted describes Heather to Robin by saying "it took her six years to graduate from three different colleges, during which time she wrecked two cars, got married for five days, and lived in a tree for nine weeks, only to realize that no one had any intention of cutting it down." She planned to transfer to New York University, but on the day of the admissions interview, she sold the the couch and the tv in The Apartment so she could fly to Spain and attend a Nine Inch Nails concert. She was also caught for shoplifting in April 2008.

Ted is protective of his younger sister, making a point of keeping her from meeting Barney, to prevent him from seducing her. Despite this, the two met in December of 2008, soon after Heather arrives. Lily discovers the two half-dressed in Barney's office and relays this to Ted, who becomes furious and disappointed at the two. It is later revealed that Barney and Heather did not sleep together, instead taking advantage of both Lily and Ted to prove that Heather had matured.

Heather decided to pursue a career in finance and move to New York City, and asked Ted to co-sign her lease. Ted refuses, believing that Heather was still immature and irresponsible. However, he came to realize that she had grown up, and agreed to co-sign her lease.

Family[]

Spouse: Unknown (ex-husband)
Mother: Virginia Mosby
Father: Alfred Mosby
Brother(s): Ted Mosby
Grandparents: Unnamed Grandmother (Deceased) (Brunch)
Niece(s): Penny
Nephew(s): Luke
Cousin(s): Stacy, Jimmy, Bonzo (Best Prom Ever)
Other: Clint (step-father)
In-law(s): Tracy McConnell (d.2024)
Pet(s): The dog in Sunrise that steals young Ted Mosby's hot dogs and appears to be the Mosby family dog but is unknown

Notes and Trivia[]

Heather's first mention is when her and Ted's parents, Alfred and Virginia Mosby, ask him in Brunch to not tell her about their divorce. Ted tells in Single Stamina of how he celebrated Heather's marriage with her despite, disapproving of her husband ("Sandals and socks; come on, buddy."). She is also mentioned in Stuff.
In Dowisetrepla, it is revealed that she and Ted used to be detectives by the name The Mosby Boys and solved the case of a missing retainer.
Heather's only appearance in the series is in Little Minnesota; however, she appeared off-screen in Home Wreckers at her mother Virginia's and Clint's wedding. Heather apparently did not attend her brother's 2008 wedding to Stella Zinman in Shelter Island, as Robin had not known much about her before meeting in person later that year.
Ted explained that Heather once sold the couch in The Apartment. This may be a retroactive explanation for the unexplained couch switch between Come On and Where Were We?.
Despite moving to New York, Heather never appears in the series again. While it's possible she was present at Ted's wedding to The Mother, she wasn't shown.
It’s unknown what became of her by 2030.