Emma Watson has launched a social media appeal after losing her “most meaningful and special possession” at a luxury London spa at the weekend.

The Harry Potter actress has offered a reward for “information leading to the return of [the] rings” as she shared details of their sentimental value on Facebook.

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The rings have huge sentimental value.

Explaining that one of the rings was bought by her mother the day after she was born, and handed down on Emma’s 18th birthday in 2009, the star wrote: “Reward for information leading to the return of rings lost Sunday 16th July at Mandarin Oriental Spa, London.

“On Sunday afternoon I went for a treatment at the Mandarin Oriental Hotel Spa in Hyde Park, London. Before my appointment I removed 3 silver rings from my fingers and put them in the safe inside the locker. When I left, I forgot to take my rings from the safe.

“When I got home I realised the rings were not on my hands and I called the spa, but at this time the spa was closed. Security checked the safe and said there was nothing in it but that the spa would be open again in the morning and they could speak to them then and see if they had them or if anyone had handed them in.

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Emma shared images of the rings.

“As of now they are missing. Were these just any rings I could accept this, but one of the them was a gift from my Mum. She bought it the day after I was born and wore it for 18 years, never taking it off, and then gave it to me for my 18th birthday.

“I wear this ring everyday, it is my most meaningful and special possession.

“If anyone was at the Mandarin Oriental Spa on Sunday from 3pm onwards and saw the rings or accidentally picked them up or knows anything about them, I cannot express how much it would mean if they came back to me – no questions asked.

“If you have seen them or have any information please email: findthering@outlook.com”.

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The star’s mother gave her this ring on her 18th birthday.

Emma also shared images of the three rings as well as a close up of the one that her mother had given her.

The star was quickly inundated with comforting messages and support from her fans, who have taken it upon themselves to track down the jewellery for Emma.

One wrote: “I sent you a e-mail, I’m looking on the Internet for them just in case someone tries to sell them.

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Emma’s fans have rallied around her.

“Do they have diamonds around them too? I’m sure with all of your fans we will get them back.”

Another added: “I was brought up Catholic and when something went missing, we would ask St. Anthony, the finder of lost things to help. I’ll put in a word for a little help.”

If you have any information regarding Emma’s lost rings, email her on newsvillas90@gmail.com .