EXCLUSIVE: George Clooney's 87-year-old superfan reacts to actor's surprise nursing home visit

Best. Birthday. Ever.

Pat Adams got the surprise of a lifetime on Sunday, when George Clooney walked into her Sunrise of Sonning Retirement and Assisted Living Facility to wish her a Happy 87th Birthday.

Employee Linda Jones never expected to answer the door of the nursing home for an Oscar winner.

WATCH: Amal Clooney on How Her High-Profile Marriage Affects Her Work: 'I Think It's a Really Good Thing'

"I couldn't believe my eyes when I saw George walking across the car park," Jones told ET. "Just one guy came with him, very low key. Just rang the bell and I answered and just asked if George could come in and visit Pat...[He was] absolutely gorgeous! Absolutely lovely, very good looking!"

Clooney came equipped with a bouquet and a signed card for the birthday girl.

Sunrise UK

"Well, I just thought, 'Ooo, is it really George Clooney?' And anyway it was. And he is a charming man, just a very nice man," Adams told ET. "He's a lovely man and he does a lot of good. I've such a hectic day. It's all been wonderful, believe you me!"

The 87-year-old had been asking to meet her idol for a while and her dream came true, thanks to the home's Wish Upon a Star initiative. Even though the actor and humanitarian clearly received the letter, no one knew he'd be stopping by.

"We had no idea he was coming in that day," Jones said. "I knew Sunrise had written to George Clooney several times on behalf of Pat because it had been her lifelong ambition to meet him. So we were always hoping every day he would pop in, especially Pat, and then he surprised us all."

Clooney and his wife, Amal, have a home in local Sonning, but he is "by far" the biggest name to walk through the facility's doors. He visited with Adams for about 15 minutes.

"Well, he shook me by the hand and said, 'Did I like it here?' and I said, 'Oh yes, I love it. I'm very happy. Everybody's very nice.' You know, he's just very, very nice," Adams told ET.

Sunrise UK

Adams also heard the exciting news that the actor is about to become a first-time father of twins.

"I think he'll make a very good father. And I wish him joy. And I just hope it all goes well for him because he's such a nice man," she said.

WATCH: George and Amal Clooney Step Out to Take Selfies With Fans After Pregnancy Debut

As for what could top this year's birthday surprise, Adams still has high hopes.

"I don't think it's going to be quite as exciting as this," she admitted. "But I still love it here and I've got friends here, so all in all it will be very nice again. Who knows, he might come in again, you never can tell!"

RELATED: See photos of George Clooney through the years:

23 PHOTOS
George Clooney through the years
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George Clooney through the years
UNITED STATES - MAY 02: ROSEANNE - 'Let's Call It Quits' - Season One - 5/2/89, Roseanne has difficulty accepting new rules from a tough new supervisor at the factory. George Clooney (Booker) stars., (Photo by ABC Photo Archives/ABC via Getty Images)
THE FACTS OF LIFE -- Pictured: George Clooney as George Burnett -- Photo by: Ron Tom/NBCU Photo Bank
ER -- SEASON 4 -- Pictured: George Clooney as Doctor Doug Ross (Photo by Sven Arnstein/NBC/NBCU Photo Bank via Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 1404 -- Pictured: (l-r) Actor George Clooney during an interview with host Jay Leno on June 25, 1998 -- (Photo by: Margaret Norton/NBC/NBCU Photo Bank via Getty Images)
NBC SUNDAY NIGHT AT THE MOVIES- COMBAT HIGH -- Pictured: (l-r) Keith Gordon as Max Mendelsson, George Clooney as Maj. Biff Woods -- (Photo by: Paul Drinkwater/NBC/NBCU Photo Bank via Getty Images)
George Clooney and Julia Roberts during 11th Annual Critics' Choice Awards - Backstage and Audience at Santa Monica Civic Auditorium in Santa Monica, California, United States. (Photo by Chris Polk/FilmMagic)
George Clooney and Michelle Pfeiffer on phones in backseat of car in a scene from the film 'One Fine Day', 1996. (Photo by 20th Century-Fox/Getty Images)
George Clooney, Mark Wahlberg And Ice Cube Star In 'Three Kings.' '99 Wb And Village Roadshow Film Limited (Photo By Getty Images)
1999 George Clooney stars in the latest season of 'ER.'
NEW YORK, NY - MARCH 02: Actor George Clooney attends SeriousFun Children's Network's New York City Gala at Avery Fisher Hall, Lincoln Center on March 2, 2015 in New York City. (Photo by Dimitrios Kambouris/Getty Images)
WESTWOOD, CA - DECEMBER 5: Actor George Clooney attends the 'Ocean's Eleven' Westwood Premiere on December 5, 2001 at the Mann Village Theatre in Westwood, California. (Photo by Ron Galella, Ltd./WireImage)
George Clooney (Photo by Vera Anderson/WireImage)
US actor/movie maker George Clooney speaks during the global launch of 100 LIVES initiative and the announcement of a new humanitarian prize in New York on March 10, 2015. The 100 LIVES, initiated to express gratitude to individuals and institutions whose heroic actions saved Armenian lives during the Genocide 100 years ago, is to address the issues of genocide, human rights violations and the power of positive action. AFP PHOTO/JEWEL SAMAD (Photo credit should read JEWEL SAMAD/AFP/Getty Images)
HOLLYWOOD - MARCH 31: Actor/director George Clooney arrives to the premiere of Universal Pictures' 'Leatherheads' held at Grauman's Chinese Theatre on March 31, 2008 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
BERLIN, GERMANY - FEBRUARY 8: (L to R) Actors Natascha McElhone, Ulrich Tukur, George Clooney and director Steven Soderbergh attend the 53rd Berlinale Film Festival February 8, 2003 in Berlin, Germany. Their new film 'Solaris' was written and directed by Soderbergh. (Photo by Kurt Vinion/Getty Images)
David Strathairn and George Clooney during 2005 Venice Film Festival - George Clooney - Sighting in Venice Lido, Italy. (Photo by George Pimentel/WireImage)
US actor and director George Clooney (R) and co-star Renee Zellweger arrive in London's Leicester Square on April 8, 2008 to attend the European Premiere of the film, Leatherheads directed by Clooney. AFP PHOTO / Max Nash (Photo credit should read MAX NASH/AFP/Getty Images)
LOS ANGELES - NOVEMBER 14: Actor George Clooney speaks to the media at the Four Seasons Hotel on November 14, 2006 in Los Angeles, California. (Photo by Piyal Hosain/Fotos International/Getty Images)
Nominee for Best Actor ('Michael Clayton') George Clooney (R) and gilrfriend Sarah Larson arrive for the 80th Annual Academy Awards at the Kodak Theater in Hollywood, California on February 24, 2008. AFP PHOTO / STAN HONDA (Photo credit should read STAN HONDA/AFP/Getty Images)
Actor George Clooney speaks during the 80th Annual Academy Awards held at the Kodak Theatre on February 24, 2008 in Hollywood, California. (Photo by Kevin Winter/Getty Images)
Matt Damon and George Clooney (Photo by Lester Cohen Archive/WireImage)
George Clooney at junket for 'Good Night and Good Luck,' a new movie. (Photo by Michael Albans/NY Daily News Archive via Getty Images)
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