The pair called it quits nearly five years ago.
Rock recently worked with Mulaney amid the comedian's divorce.
The pair have called it quits due, in part, to "work commitments."
The actress was first linked to the chef in September.
The reality star announced the news on Instagram ahead of Tuesday's 'RHOD' reunion special.
The 'Masters of None' star announced their split in January 2020.
The actors were married from 2009 to 2018.
Jennifer Gates shares a message to her Instagram Story about the surprising split on Monday.
The singer and actress announced her split from Caussin last month.
The 'How I Met Your Mother' star's longtime girlfriend says they will 'remain best friends.'
Caussin previously admitted to cheating on Kramer in the past.
The singer-actress shared the news on her social media on Wednesday. The two previously split in August 2016 amid cheating allegations.
The pair announced their engagement in April 2019.
The actress announced her 21-year-old son's engagement last August.