Rapper YBN Almighty and Blac Chyna. Picture: Instagram

Blac Chyna's teenage boyfriend has proposed to her over social media.

Rapper YBN Almighty Jay, 18, has only been dating the 29-year-old reality TV star since February but he's wasted no time declaring his love for his new girl as he took to his Instagram account on Tuesday, April 10, to ask her to marry him.

Alongside a photograph of Chyna wearing a white jumper dress and trainers while perched against a bumper in a car park, he wrote: "Will You Marry Me? (sic)"

Will You Marry Me?💍

A post shared by 👑 YBN Almighty Jay (@ybnalmightyjay) on

Chyna is yet to comment on her boyfriend's very public display of affection.

The couple were first spotted together on a bowling date in February and then paraded their new romance a few days later by holding hands in public.

It's also thought the young rap star - whose real name is Jay Bradley - was with the model when she attempted to hurl a children's stroller at a women in the amusement park Six Flags because she had allegedly tried to touch one of her children.

Chyna's ex-fiance Rob Kardashian, with whom she has 16-month-old daughter Dream, is reportedly taking her to a family court over the brawl because he's become increasingly concerned about her behaviour around his child over the last few weeks.

However, the blonde star - who also has five-year-old son King Cairo with her ex-boyfriend Tyga - jumped on social media to her actions at the theme park.

She wrote: "Being famous is hard enough dealing with scrutiny but when someone feels comfortable to come and touch your child it's a whole other story.

"I do not condone violence nor am I a violent person but shout out to all of the amazing mothers out there that will protect their children at all cost. Love, King and Dreams mommy. (sic)"