Ioan Gruffudd still gets ''excited'' when he meets famous people.
The 'Fantastic Four' actor - who is expecting his second child, a sibling for three-year-old Ella, with wife Alice Evans - has worked in Hollywood for over 10 years but admits he still feels in awe of other celebrities.
He said: ''I've gotten used to it now, but it's still exciting. The more time you spend in places mingling with celebrities, the more confident you become.''
Ioan worked with Leonardo DiCaprio on 'Titanic' in 1997, and despite his huge successes, the US star is just the same now as he was back then.
Ioan said: ''He's such a lovely guy and an amazing actor. He's so consistent too. Whenever I see him, he always remembers our time together - even though it was about 15 years ago now.''
The Welsh actor believes big stars are often nicer and less diva-like than up-and-coming faces because they are comfortable with themselves.
He told Britain's OK! magazine: ''I think it's because the bigger stars know they don't have anything to prove. They've achieved everything they wanted and they've done it all. It's the wannabes who let it go to their heads because they haven't quite achieved the status they want in the industry.''