April Love Geary has admitted she was ''rude and bratty'' on the day she met Robin Thicke.

The 23-year-old model - who is expecting the couple's second child and already has six-month-old daughter Mia Love with the singer - has marked the couple's fourth year together by confessing she was difficult on their first date and that she can't believe the 'Blurred Lines' hitmaker ''eventually fell in love with her''.

Alongside a picture of the pair on the beach with their daughter, she wrote on Instagram: ''FOUR years ago I met this guy at a party in Malibu and I was SO RUDE & BRATTY but he still saw something in me and somehow eventually fell in love with me. And now we're on baby number two omg I love you so much (sic)''

The couple recently held a gender reveal dinner for their second child, who is also a girl, at celebrity hotspot Catch in Los Angeles.

April took to her Instagram Story to share several clips of the party, including one of them cutting a chocolate cake open and pink liquid pouring out of it, signalling they are expecting a second daughter.

The brunette beauty also added a picture of her kissing the singer, and captioned it: ''Going to have another daddy's girl!!! I love you baby! thank you @markbirnbaum for doing the best sex reveal ever!!!!! At my favorite restaurant @catch (sic)''

The pair revealed they were to become parents again in August, by sharing a video of young Mia holding a sonogram, with the caption: ''Well someone is going to be a big sister next year! We're so excited to share with y'all that I'm expecting again! (sic)''

Robin and April's baby joy came after April revealed she tragically suffered a miscarriage before falling pregnant with Mia.

When asked during an Instagram Story Q&A if she was ''scared'' by the possibility of miscarrying, she said: ''I had one before Mia. But I'm not scared, worrying or stressing out too much isn't good for the baby. Life happens and we can't control everything.''

The couple's little girl is due on March 10, 2019, which will be Robin's 42nd birthday.