Kaley Cuoco is doing "amazing" since splitting from Ryan Sweeting.

Kaley Cuoco

Kaley Cuoco

The 29-year-old actress and her tennis player husband announced last week they had separated after 21 months of marriage, and she is being supported through her heartache by her friends and family, including her 'Big Bang Theory' co-stars.

Asked how Kaley is feeling, co-star Mayim Bialik told E! News: "Kaley's amazing. She has amazing friends, she has amazing family.

"We love her to pieces and we give her as much joy and laughs as we give everybody who sees the stuff that we do but she gets to experience it off camera."

Kaley cited "irreconcilable differences" when filing for divorce earlier this week.

She and 28-year-old Ryan had signed a pre-nuptial agreement one month before their marriage on December 31, 2013 and she has listed their date of separation as September 3, 2015.

Kaley's net worth is approximately $45 million while Ryan is believed to be worth $2 million.

Her divorce filing states that property and spousal support information is detailed in the pre-nuptial agreement.

It was recently claimed that Kaley and Ryan had tried to reignite the spark between them, but there was clear "tension" whenever they went out together recently.

A source said: "The few times Kaley and Ryan were out together recently, the tension was noticeable. You could tell the honeymoon phase had ended.

"It seemed they were trying to work out their marriage by going on dates, but they both seemed miserable."

Following news of the split, Kaley deleted all traces of her estranged husband on Instagram and unfollowed him across her various social media accounts.