The St. Elmo's Fire actor unveiled the 2,567 star on the Walk of Fame on Hollywood Boulevard in Los Angeles surrounded by his family, including his actor brother Chad Lowe and his The Grinder co-star Fred Savage.

Gwyneth, who has been friends with Rob since she was a teenager, also attended the ceremony, and praised her pal in a speech, telling the audience, "It's really an honour for me to be here today. I also have been a fan of Rob Lowe for many, many years... St. Elmo's Fire is my favourite movie. My favourite part is Rob's sax solo when he's in the bar. I could sing it note for note but I won't bore you with that. It's really an incredible pleasure to be here. Thank you so much for asking me to participate 'cos it's a real honour. You deserve this so much, and so much more, and I love you."

Rob praised Walk of Fame organisers for putting his star outside Musso & Frank's restaurant, where he "drank many a martini" in his early years, and next to the star for late TV and film producer Aaron Spelling.

During his speech, he recalled, "When I was 13 years old, I had just arrived from Ohio, I don't know anything about anything, I didn't know what an agent was... but I wanted to be an actor. They were filming (TV series) Charlie's Angels down the street and I went up to somebody on the crew who looked very important... I asked him for Aaron Spelling's address so I could write him a note to ask for a job.

"So I wrote a letter to Spelling and he wrote back to me. Personally. He said, 'Hey kid, you can't really come to the studio without your parents' permission, number one. And number two, I think one day you might actually have my job.' Well, Mr. Spelling I never did get your job, but today I'm right next to you on the Hollywood Walk of Fame."

Gwyneth and Rob also co-starred in 2003 comedy View from the Top.