Newlywed Beyonce Knowles has a lot to learn about becoming a mother, according to the star's younger sister Solange.

The Crazy in Love hitmaker - who married long-term partner Jay-Z last week - often looks after her three-year-old nephew Daniel.

But the 26-year-old finds it a struggle and regularly calls on her sister for advice on performing maternal activities.

Solange tells People.com, "Whenever Beyonce decides to have a child, I definitely think she'll be banging on my door."

"She's kept my son over the weekend. She'll call me like, 'How do you get this stroller out? And what about the car seat? I don't know how you do this!' And I'm like, 'People do it every day.'"