Courtesy Children’s Hospital Los Angeles
08/23/2013 at 05:00 PM EDT
put a sparkle in the eyes of a group of young people when he visited the Children's Hospital Los Angeles.
star made a surprise trip to the hospital's Teen Lounge on Aug. 16, and joined the patients who were decorating picture frames.
The 27-year-old, who is currently filming Maps to the Stars
in L.A., created a pink frame decorated with hearts, and laughed at his own "terrible" artistic skills before posing for photos and signing each kid's picture frame.
"Robert was so nervous about meeting the kids – he didn't want to let them down – which is a testament to how humble he is," Child Life specialist Ana Vega said
. "He was incredibly gracious and kind."
Pattinson also visited two cystic fibrosis patients – huge Twilight
fans – who were unable to leave their rooms.
"We couldn't help laughing and smiling when one of the patients was so starstruck that she couldn't speak. You could tell it meant the world to her – she was tearing up and smiling ear to ear," said Lyndsay Hutchinson, the hospital's public information officer. "The other little girl teased him relentlessly and begged him to do an American accent. They were instant friends."