The actress showed off her growing baby bump at the Golden Globes 2019 on Sunday, January 6, in a flowy Miu Miu gown.
An eyewitness exclusively told Us Weekly that the House of Cards actress, 35, walked the red carpet with the BAFTA Award-winning actor, 32.
Kate was spotted chatting with Emily Blunt at the star-studded awards show while waiting in line for the bathroom.
According to the Page Six report, Kate told the Mary Poppins Returns actress about her pregnancy at the time.
The House of Cards alum, 35, is reportedly five months along.
Fantastic Four co-stars Jamie and Kate began dating in late 2015 and became engaged in January 2017.
The former couple had got married in 2012 and got a divorce in 2014.
Kate, meanwhile, was previously in a relationship with ex-boyfriend Max Minghella. They began dating in 2010 and after enjoying a romantic affair for four years, they got split in 2014.
For more updates, stay tuned to Frostsnow.