It's over for comedy legend and widowed Grammy-nominated singer after two months

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One of the most unexpected celebrity summer romances has come to an end, according to a new report.

On Aug. 25, The U.S. Sun reported that an unexpected and low-key relationship that cropped up between actor Bill Murray, 72, and singer Kelis, 44, a few months earlier was now over — and that the widowed "Milkshake" singer, who's nearly three decades the comedy icon's junior, is the one who pulled the plug, a source told the outlet.

Keep reading for all the details on the "Ghostbusters" and "Caddyshack" actor and the music star's split and their time together…

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In June 2023, The U.S. Sun reported that "Caddyshack" and "Ghostbusters" star Bill Murray had been spending time with "Milkshake" singer Kelis, who's nearly 29 years his junior.

"They've met up in the States before, which got people in the industry talking, and now are meeting up in London while they're both here. They've clearly hit it off," a source told the tabloid in early June, noting that Bill, who was in London shooting a "Ghostbusters" sequel, was spotted on the side of the stage, where he watched the mother of three perform during the Mighty Hoopla festival in early June as well as other recent concerts.

On top of that, the actor, who was 72 at the time while Kelis was 43, "were both seen at the same hotel."

MORE: Famous couples with big age gaps

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According to a source who spoke to The U.S. Sun in early June 2023, Bill Murray and Kelis may have discovered a connection because they "both shared relatively recent bereavements and have that common bond between them," noting that the singer's husband died from stomach cancer at 37 in 2022 while Bill's second ex-wife, with whom he has four adult sons, died in 2021.

"Whatever it is that has brought them together, and however unlikely it seems, they are both single and are having fun despite the fairly big age gap," added the source at the time.

MORE: Celebrity splits of 2023

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In June 2023 after news broke claiming Bill Murray and Kelis were dating, Kelis told a fan on social media that she "wouldn't bother" to address the rumors.

She also responded to another of many who were asking for an explanation: "Lol yeah maybe for now everyone's dumb and will believe anything but the best part is we are both blessed, rich and happy," she wrote on social media.

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As the summer of 2023 wound down, Kelis and Bill Murray went their separate ways, The U.S. Sun reported in late August.

"Kelis and Bill were — and still are — very fond of each other but things just ran their course. They both have busy schedules and after a whirlwind romance decided to go their separate ways," a source told the outlet. "They hope to remain friends but also plan to get on with their lives."

According to the source, the widowed mother of three is the one who called things off.