We can't believe it but the world's most famous cat is 35 years old! She might not have a mouth, but she's soooo cute!

Sugar were lucky enough to be invited to a special celebrity birthday party this week.

Hello Kitty's!

She might have been 'born' in 1974 but the Kitty is still sitting pretty with loads of A-list fans.

Celebs like Alice Dellal, Little Boots and Dionne Bromfield turned up to Sketch tea rooms to celebrate.

We even ate a cake in the shape of Kitty herself!

Look out for loads of special 35th Anniversary Hello Kitty products in the shops over the next few months.

Check out this amazing vid of Kitty through the years...my she hasn't changed one bit!

Do you think she's had work done?!

What do you think of Hello Kitty?