Julia Roberts' kids want to know if she's more famous than Taylor Swift.

The 50-year-old actress says her children - Hazel, 13, Phinnaeus, 13, and Henry, 11 - don't really care about her own fame and are more worried about how famous she is in relation to the international popstar.

She said: ''I don't think they will ever have a true sense of that. I think I told you once when they were starting to figure it out, it was like, 'You're famous?' And I said, 'I think a lot of people might have seen the movie that I'm in or might know who I am.' Maybe an hour goes by. 'Are you more famous than Taylor Swift?'''

And the 'Pretty Woman' star finds rumours about her marriage tough on both herself and her family.

Speaking to the November issue of Harper's Bazaar magazine, she added: ''Sometimes we are in the grocery store and I won't even know something is out, but we'll see a tabloid and we'll all be standing there like, 'Oh, that's uncomfortable. This is really uncomfortable.'

''It can still hurt my feelings, because I'm so proud of my marriage. We just celebrated being married for 16 years this Fourth of July, and there's so much happiness wrapped up in what we've found together. What I like is when they write, 'the $150 million divorce,' and then a week later a different tabloid says, 'the $275 million divorce'. I'm like, 'Well, somebody got a paycheck in the last week. This is getting good.'''