As one of the most famous actresses in the world, Scarlett Johansson is used to an exciting, fast-paced life in the world of celebrity, but in a new interview with Parade Magazine, she reveals her biggest joy is spending time with her baby daughter Rose Dorothy.

Scarlett Johansson attends the UK premiere of Avengers: Age of UltronScarlett Johansson attends the UK premiere of Avengers: Age of Ultron

She told the magazine, "When I’m just hanging out with her and we’re doing silly stuff and if I make her laugh, the feeling of joy I have is explosive. If I can make her laugh and she gets a big smile on her face, that’s pretty much it. If only you could actually bottle that and carry it around."

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The Avengers stunner also opened up about how her relationship with husband Romain Dauriac, a French art curator, is different from her previous marriage to fellow actor Ryan Reynolds.

She said, "Acting is a very strange world to be co-existing in. It's very volatile. There's always going to be the more successful person [...] Actors, if they're not having success, connect it directly to unpopularity - to the fact that nobody wants them. It's not necessarily true. I'm constantly rejected."

More: Photos of the actress at the Avengers: Age of Ultron premiere

Scarlett, 30, was praised for her performance in eerie sci-fi thriller Under the Skin last year. She's currently starring as Black Widow alongside Robert Downey Jr (Iron Man), Mark Ruffalo (Hulk), Chris Hemsworth (Thor), Chris Evans (Captain America) and Jeremy Renner (Hawkeye) in Avengers: Age of Ultron, which reaches US cinemas on May 1.