Anne Hathaway felt intimidated after looking at Pintrest to get ideas for her son's first birthday party.

Anne Hathaway

Anne Hathaway

The Oscar-winning actress was preparing to throw a special birthday bash for her son Jonathan in March, when she decided to refer to the photo-sharing app and quickly realised she couldn't compete with the efforts of other mothers.

Anne - who welcomed Jonathan alongside her husband Adam Shulman on March 24 last year - shared: "We tried to keep it pretty low-key. We kept the theme just rainbows, which is a fun theme because it's hard to go wrong with it.

"But I made the mistake - I went on Pinterest and looked at other people's one-year-old parties. It's not fair what some people do."

The Hollywood star said she felt particularly outshone by those parents who also work as professional party planners.

Appearing on 'The Ellen DeGeneres Show', she said: "You know, some party planners have children, which is definitely not fair. Think about it. They blow it out!"

Meanwhile, Anne recently admitted she felt proud to have kept her butt in "great shape" when she was pregnant - only to later realise she'd caught a glimpse of her stunt double's derriere.

The 34-year-old actress was adjusting to her changing figure while shooting the sci-fi movie 'Colossal' with Jason Sudeikis and Anne confessed she couldn't recognise herself on screen.

Reflecting on her changing body shape, Anne said: "It's funny because your body changes when you're pregnant. And it was my first pregnancy so I didn't know what was going on.

"There's a shot in the movie when I saw it and I was like, 'Oh see, I kept my butt in great shape'. And the second time I watched the movie I realised it was her [the stunt double]."