She's all smiles! Anne Hathaway radiates happiness as she steps out looking svelte in black just three weeks after giving birth

She gave birth to her first child just three weeks ago but on Saturday Anne Hathaway confidently stepped out in a black dress with cut-out and sheer panels.

The Oscar-winning actress, 33, not only looked elegant but she also radiated happiness as she and husband Adam Shulman attended a friend's baby shower.

The couple welcomed son Jonathan on March 24. 

Anne Hathaway, who gave brth to baby son Jonathan just three weeks ago, looked flawless and slim as she stepped out in a flattering black dress on Saturday in West Hollywood.

Anne's sophisticated dress consisted of a solid layer of fabric that fell to her thighs, and a longer outer layer that was sheer on the top and featured mostly transparent cutouts on the bottom.

Some black strappy heels with silver highlights, oversize sunglasses and a small burgundy shoulder bag with a gold clasp rounded out the hip ensemble.

A slick of crimson lipstick served to emphasize the smile that graced her still flawless visage.

The Les Miserables star held her hand up to show the letter B on the palm of her hand, then bowed her head as Halo played in the background, before pointing at her head and making an explosion sound.

She captioned the video: 'Respect beyond respect. @Beyonce just changed so many games. Queen just became an Empress. Chills all over. #LEMONADE.' 

Her outing to the baby shower is her first appearance since she posted an Instagram video hailing Beyonce's new Lemonade album on Wednesday.

Adam, 35, played his part by carrying the celebrity couple's gifts for the baby shower - with the mom-to-be obviously expecting a girl.

He carried a couple of pink boxes containing their gifts. 

Adam kept things quite low-key in a grey sweater with angular blue accents, distressed jeans and a pair of navy colored boots.