Hailey McGregor is the woman at the center of the william byron girlfriend speculation that has circulated since August 2025, but neither Byron nor McGregor has confirmed the relationship. Every detail about her identity, from her name to her education, comes from fan observations and social-media detective work — not from any public statement by the Hendrick Motorsports driver or McGregor herself.
That gap between what fans think they know and what has been confirmed creates a story built on fragments: a NASCAR promo clip, a Reddit thread, an Instagram bio that went private hours after the discovery, and a four-year relationship with Erin Blaney that ended without a word from either side.
The Daytona Moment: How a Routine Promo Clip Sparked the Search
Before the Coke Zero Sugar 400 at Daytona in August 2025, NASCAR’s production crew filmed Byron during the national anthem for a standard pre-race hype video. He stood with his hat over his chest. Next to him was a woman in a red dress wearing a track credential.
The clip was meant to promote the race. Fans watching it saw something else.
“A mystery blonde.”
— r/NascarWAGTea, August 2025 (127 upvotes)
Within hours, the r/NascarWAGTea subreddit had identified her as Hailey McGregor. One user posted that her Instagram had been public the night before but was switched to private shortly after the race. The account — @haiiley5 — lists a JD-MBA dual program at Elon Law School in its bio. At the time of the discovery, it had about 40 posts and just over 2,500 followers, according to EssentiallySports.
The resemblance to Sabrina Carpenter, noted immediately by viewers, added momentum. Fan-edited images falsely pairing Byron with the pop star had circulated earlier in 2025, so when a blonde woman appeared at his side during a race broadcast, the connection was already primed. But the woman in the red dress was not Carpenter — and Byron had already addressed that rumor months before.
McGregor appeared again at Martinsville in October 2025, spotted in the stands wearing 24 gear, Byron’s number, with friends. She left before Byron reached victory lane, a detail that fans on Reddit catalogued with the precision of amateur intelligence analysts.
Who Is Hailey McGregor? What Public Clues Reveal
McGregor has never given an interview, never posted about Byron, and locked her Instagram the moment public attention arrived. What is known comes entirely from her Instagram bio before it went private and from fan observations at races.
She is believed to be in her mid-20s, around Byron’s age (he was born in 1997). Her height is roughly 5 feet 5 inches. Her Instagram bio stated she was pursuing or had completed a JD-MBA at Elon Law School. That single entry is the only public clue about her professional life. No employer, no past roles, no alma mater beyond Elon has surfaced.
The absence of information is itself a signal. Byron’s previous relationship with Erin Blaney was known publicly for years, with the two appearing together at NASCAR awards ceremonies, on pit road, and in interviews. McGregor, by contrast, exists in the public record only as a face in a crowd shot and a now-private Instagram handle. Race-day sightings at Daytona and Martinsville remain the extent of confirmed appearances.
Erin Blaney: The Four-Year Relationship Before McGregor
Byron dated Erin Blaney from late 2019 through spring 2024. Blaney, born March 12, 1997, is the sister of fellow Cup Series driver Ryan Blaney, a connection that made the relationship a recurring subplot in NASCAR coverage, especially when both Byron and Ryan Blaney competed in the 2023 Championship 4 together.
Erin Blaney grew up in Ohio and North Carolina, graduated from Bishop McGuinness Catholic High School, and earned a bachelor’s degree in Human Environmental Science and Public Health Education from the University of Alabama, as detailed by USA Network. She spent three years as Executive Director of the Ryan Blaney Family Foundation, helping raise funds for brain injury research and community programs, then moved to a community development role at Make-A-Wish of Central and Western North Carolina in 2024.
“I was sad when him and Erin Blaney broke up just because it gave people something to talk about with William. William is a little vanilla. Lol”
, r/NascarWAGTea, August 2025 (32 upvotes)
The split itself was quiet. The Express reported that Blaney unfollowed Byron on social media in spring 2024 and left his organization at the same time. Neither has discussed the breakup publicly. Ryan Blaney, asked about the dynamic back in 2020, told NBC Sports his initial reaction was surprise, “My buddy’s like, ‘Hey I didn’t know about Willy and your sister'”, but emphasized he supported his sister’s choices and maintained a respectful racing relationship with Byron.
The Sabrina Carpenter Rumor Byron Shut Down Himself
Altered images linking Byron to Sabrina Carpenter spread through NASCAR social media in early 2025, and the speculation intensified when Carpenter and actor Barry Keoghan broke up around the same period. Some of the fakes placed the two together at race events neither had attended. The fan logic was straightforward: Byron was single, Carpenter was single, and someone with Photoshop skills decided to connect them.
Byron addressed it head-on. He told The Express the rumor was nothing more than a joke, adding that he might invite Carpenter to a race or attend one of her shows, but confirmed flatly that they were not in a relationship. When McGregor appeared at Daytona months later and fans again noted the resemblance, the Carpenter connection resurfaced, not because it was true, but because the visual similarity kept feeding the same conversation.
What Byron and McGregor Have Not Said
No public confirmation exists. Byron has never named McGregor in an interview, never posted about her, and never appeared with her in any formal setting. McGregor has stayed equally silent.
A Reddit user who claimed to have worked with McGregor on projects insisted she was “engaged not to Byron,” but that post, with 32 upvotes and no corroboration, is as thin as every other piece of evidence in this story. In the absence of a statement from either person, every article about William Byron’s girlfriend is reporting on what fans saw in a crowd shot and what a now-private Instagram bio once said.
Common Questions
Are William Byron and Erin Blaney still together?
William Byron and Erin Blaney ended their relationship in spring 2024, roughly four and a half years after they began dating in late 2019. Blaney unfollowed Byron on social media and left his organization that spring.
Is William Byron in a relationship?
William Byron has not publicly confirmed being in a relationship. Hailey McGregor has been seen with Byron at two NASCAR events, the Coke Zero Sugar 400 in August 2025 and at Martinsville in October 2025, and fans widely believe they are dating, but neither has addressed the nature of their connection.
Does William Byron have a wife?
William Byron does not have a wife and has never been married. The william byron girlfriend question, not a wife question, is what fans have been trying to answer since Hailey McGregor appeared at Daytona in August 2025.
Are Ryan Blaney and William Byron friends?
Ryan Blaney and William Byron maintain a respectful professional relationship that survived Byron dating Blaney’s sister Erin for over four years. Blaney told FOX Sports in 2023 that the two “race hard on the racetrack like any other competitor” and confirmed he does not treat Byron differently because of the personal connection.
