Lily Allen was spotted wearing a large diamong on her ring finger during a bike ride in London.
The Smile singer split from her husband, Stranger Things actor David Harbour, in December after five years of marriage.
Last month, the 40-year-old was seen enjoying an apparent date with actor James Norton, with the pair watching Charli XCX perform at a music festival.
Allen went for a solo outing on Sunday, rocking a glitzy gold band on her left hand while riding her bike through Notting Hill, in photos obtained by MailOnline.
The ring appeared to be different to the engagement and wedding band she wore during her marriage to Harbour.
The new piece of jewellery - which is not believed to be an engagement ring - has a pear-shaped stone while her past engagement ring was silver and had a round stone.
Allen is thought to have bought a home in Notting Hill, where she grew up, after moving back to London from New York following her split from Harbour.
“She's a west London girl and is loving being back,” a source previously told the Daily Mail.
“Her new place is just a ten-minute walk from her mum's home and they are very close.”
Allen lives with her two daughters - Ethel, 13, and Marnie, 12 - who she shares with her ex-husband Sam Cooper.
She appears to be enjoying the dating scene since moving home, and was recently seen with Happy Valley actor Norton, 39.
The duo were seen watching Charli XCX perform at Lido festival in Victoria Park, smiling and chatting as they drank non-alcoholic beers during the Brat hitmaker’s show in mid-June.
The pair, who reportedly met on the celebrity dating app Raya, seemed “really relaxed” together, in photos obtained by The Sun.
“Lily and James appeared to be on a date. They were together for the day and were chatting and laughing together as they watched Charli XCX. Lily was leaning into him at one point,” an insider said.
“She and James seemed really relaxed together and she was really making him giggle. They were drinking non-alcoholic beer and queued at the bar like all the other punters.
“People were doing double-takes when they saw them together.”
Allen and Harbour split in December - five years after tying the knot in Las Vegas - amid claims they had been living separate lives for months.
In January, it was reported that Allen was "in agony" after discovering Harbour had an active profile on Raya.
Two months later, Harbour faced claims that he "had a three-year affair" with a costume designer during their marriage. He has not commented on the claims.
Following the breakdown of her marriage, Allen checked into a £10,000-a-week American clinic, reportedly in "emotional turmoil" and "highly medicated" on antidepressants.
