EXCLUSIVE: Kris Jenner is 'thrilled' about Blac Chyna's pregnancy and 'excited to have another grandchild'

Blac Chyna revealed last Friday that she and her new fiance, Rob Kardashian, are expecting a baby, and her soon-to-be-mother-in-law Kris Jenner is apparently "thrilled" about the upcoming addition to the family.

A source close to Rob tells ET that Kris "is thrilled about the pregnancy," despite reports that the Kardashian matriarch has bad blood with the mom-to-be.

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"Rob turned his life around and it's all because of Blac Chyna," the source shared. "She has brought him back to his old self and Rob is so excited to be a father."

See images of Rob Kardashian and Blac Chyna:

While Rob and Blac Chyna's relationship has been steeped in drama, the source explained that Kris has "made amends with the entire situation" and is "so excited to have another grandchild."

This will be the 29-year-old Keeping Up With the Kardashians star's first child and the second child for Blac Chyna. The 28-year-old model shares a 3-year-old son, King Cairo, with rapper Tyga.

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Tyga, 26, who recently split from longtime girlfriend and Rob's half-sister Kylie Jenner, has been supportive of his ex-fiancee's relationship with Rob, and even congratulated her on the big news on Instagram.