Taylor Swift has given a “friendly but extremely important reminder” to her American fans to vote in the presidential election.

The neck-and-neck race between Kamala Harris and Donald Trump – which is believed to be the closest since 2000 – has seen US stars throw their weight behind both candidates.

It had been widely speculated that Swift would appear at Ms Harris’s final rally in Pennsylvania – where the 34-year-old singer grew up.

However, the Shake It Off singer was at Arrowhead Stadium to support her boyfriend – NFL star Travis Kelce – who was playing for the Kansas City Chiefs in a game against the Tampa Bay Buccaneers.

US election latest: Voting begins for millions of Americans

Oprah Winfrey and Lady Gaga were the big names alongside Ms Harris at her final big event.

Swift’s election reminder came in a post she shared on the eve of polling night, celebrating the wrap of the US leg of her Eras Tour, and sharing images from her last three gigs.

In the Instagram post, the singer wrote: “Thank you to everyone who came out to see us on our last three American shows.

“And here’s a friendly but extremely important reminder that tomorrow is the US election and your last chance to vote.”

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She will pick up her tour in Canada next week, with six shows in Toronto and three in Vancouver.

Her record-breaking shows – which have boosted the economy around the globe – will wrap on 8 December.

Swift publicly confirmed her support for Ms Harris in September, sharing the message on social media: “I believe we can accomplish so much more in this country if we are led by calm and not chaos.”

At the time, Swift also shared links to information on how to register to vote and find out early voting dates, reminding voters: “Your research is all yours to do, and the choice is yours to make”.

Shared with a photo of the star cuddling one of her beloved cats, she signed off her post “Childless Cat Lady,” in a nod to Republican vice-presidential candidate JD Vance’s now infamous 2021 remarks.

In a bid to sway voters, a host of other celebrities have nailed their colours to the mast, with stars including Beyonce, Jennifer Lopez and Bruce Springsteen coming out in support of Ms Harris, while Donald Trump has the likes of Elon Musk, Kid Rock and Hulk Hogan supporting him.