Blac Chyna and Rob Kardashian are tying the knot soon.

According to reports, Blac Chyna is now planning to lose some weight for their wedding day. The 28-year-old model and her fiancé Rob have reportedly agreed on their wedding date.

Chyna and her "Keeping Up with the Kardashians" star will tie the knot on July 17, 2017, and there is a reason behind that. A source explained that they chose the date because it had something to do with Rob's favorite number.

"The number seven is Rob's lucky number, and he's extremely superstitious, so picking a date was very important to him," the source said.

Rob initially picked March 17 as their wedding date, but Chyna wanted more time to whip her body into shape as she prepares for the big day. It can be recalled that she just gave birth earlier this month to their first child.

Rob and Chyna have been dating since January of this year. Last April, they got engaged. On November 10, the two welcomed their baby daughter.

One source revealed that Chyna plans on shedding for the wedding since she has been with a much slimmer figure on recent outings. She said Chyna wanted to make sure she had already lost all her baby weight before the wedding.

"The wedding date was compromised, but Rob doesn't mind. He's just excited to marry the woman of his dreams," the source said.

Right now, the two are busy taking good care of their new baby.

"Rob and Chyna are in mommy and daddy mode, and getting married is still all well and good, but what the holidays and them both getting acclimated with being new parents--especially Rob--they'll get to it when they get to it," said the source.