Blake Lively has been criticised for an Instagram post that's been deemed racially insensitive.

The 28-year-old actress is currently wowing fans with some incredible ensembles at the Cannes Film Festival in France. She shared a snap of herself in a stunning gold sequinned gown, and drew attention to the fact that her bottom is getting bigger with her second pregnancy.

She captioned the shot: "L.A. face and Oakland booty."

This was a reference to the Sir Mix-A-Lot track Baby Got Back (I Like Big Butts), which refers to the generalisation that people from the Californian city of Oakland - a high percentage of which are African-American - have curvy derrieres. The Urban Dictionary defines an 'Oakland booty' as "a booty that is large, round, AKA bootylicious".

"With how gentrified Oakland has become, Blake Lively kind of does have an LA face with an Oakland booty," one person tweeted after Blake's post.

While another added: "....is Blake Lively even from Oakland???"

However, others appeared to be amused by the former Gossip Girl star's choice of description, with one writing: "How dare this white woman not take the words of Sir Mix-a-lot with more reverence!"

Blake is clearly unconcerned about the response to her post, as she has shown no sign of removing it from her page.

The stunning actress who married husband Ryan Reynolds on former plantation Boone Hall in Charleston, is expecting her second child. The couple are already parents to daughter James, 17 months.

Blake and her 39-year-old husband have not been shy about their hopes of having a big family, with The Sisterhood of the Traveling Pants star previously revealing, "I feel like my first child is going to be the oldest sibling to the next kid, and that may change with each and every year. I'm looking forward to how one baby influences the other, and to my family as a whole, to every single chapter."

Deadpool star Ryan also revealed he was thrilled to have kicked off his family with a baby girl, telling People back in February (16): "Having a daughter was a dream come true for me. I never admitted it out loud, to myself or my wife, but I really wanted a little girl."

It is not yet known whether the couple is expecting a baby boy or girl.