The 34-year-old star, who is taking a break of up to a month from her role as Fanny Brice in the London musical Funny Girl due to stress, fell ill while at the Champneys Forest Mere spa retreat in Liphook, England.

She was admitted to the nearby Royal Surrey County Hospital in Guildford, but has since been released and is believed to be recovering well after the unspecified medical emergency.

"Sheridan has been at Champneys to undergo total rest while she’s been recuperating during her time off from Funny Girl," a source tells Britain's The Sun newspaper.

"She has been in a better place and things have been looking up, but on Sunday there was a medical emergency and ambulances were called. But she is doing much better and it has nothing to do with stress or her state of mind.”

A spokesman for the South East Coast Ambulance Service confirmed to the paper, “We were called just before 5.20pm on Sunday following reports of a woman in need of medical attention. A car from South Central Ambulance Service was sent, along with an ambulance which we assisted with. She was assessed and treated at the scene before being taken to hospital as a priority.”

Earlier this month (May16) Funny Girl's producers announced Sheridan would be taking a break of two to four weeks from performances at London's Savoy Theatre due to stress.

"The entire team at Funny Girl is thinking of Sheridan, and know she is getting the rest and support she needs during this very difficult and stressful time," they said in a statement.

The actress has pulled out of several Funny Girl shows since learning earlier this year (16) that her father Colin had been diagnosed with cancer.

She also alarmed fans by appearing to slur her words on stage during an abandoned performance last month (Apr16).

Her co-star Maurice Lane later explained the worrying incident as being due to Sheridan having a reaction to medication she was taking to protect her singing voice.

"It made her go really woozy and funny," he told Britain's The Times newspaper.

In her absence the part of Fanny Brice, a popular movie star from the early days of Hollywood, has been taken by Natasha J. Barnes, who has earned rave reviews in the role.

At the time of WENN going to press, Sheridan's representative had not responded to a request for comment.