Rosie Huntington-Whiteley, 31, enjoys family day out with fianc Denis Mikhlin, 51, and toddler son Jack in Los Angeles

She is an in-demand supermodel and devoted mother of one.

In Beverley Hills, Los Angeles, Rosie Huntington-Whiteley spent quality time with her fiancé Denis Mikhlin and her 20-month-old son Jack on Saturday.

When she pushed her adorable son along in a toy car, the model, 31, looked casually chic in a black jacket paired with matching leggings.

She wore a black coat and wore a matching baseball cap over her blonde locks.

By going makeup free, the Vogue cover star showcased her naturally glowing skin.

Denis, 51, was the devoted father as he chatted to Jack, while dressed in a black raincoat and matching jeans.

As they played and chatted, the family seemed to be content to spend time together.

Denis Mikhlin, a Hobbs & Shaw action actress, was engaged to Rosie in January for three years.

Since their first date at the 2010 Coachella Brandon Decker and Nicolas Wells in Indio, Rosie and her fiancé have been going strong.

Since she said that everything feels'so unique and loving,' the model referred to motherhood as'magical.'

It sounds so cliché, but it's just the most magical experience,' Harper's Bazaar says. Everything sounds so magical, sweet, wholesome, and loving, and at the same time, it's been life-changing, and my attention has shifted to this individual; this is what I want to do.

'I want to pour my heart into this one right now,' She says. "Hashtag blessed, right?"'