Tom Hiddleston is set to become a father for the first time

The 37-year-old actress also confirmed the couple's baby news in an article with Vogue magazine of her getting ready for the red carpet event.

The bump's debut comes just weeks after Tom confirmed their engagement.

The 41-year-old actor has been in a relationship with the former 'Fresh Meat' actress - who he met when they co-starred in a revival of 'Betrayal' in London's West End - for three years and following speculation he had popped the question earlier this year, he has admitted that is true, though he declined to comment further on their relationship.

He simply told the Los Angeles Times newspaper: "I'm very happy."

Tom and Zawe sparked speculation they were engaged at the BAFTA Awards when a candid photo shared online by AJ Odudu showed the actress sporting a huge diamond on her ring finger, but her hands were covered by her flowing sleeves when the couple had posed on the red carpet earlier in the evening.

The pair only went public with their romance last year, but it is believed they had been living together in Atlanta, Georgia, for some time before then while Tom was shooting 'Loki'.

A source previously said: "Tom and Zawe have stayed quiet about their relationship but she has spent the last few weeks with him in the US.

"They are very well suited and enjoy the quieter side of life away from the glitz and glamour of the showbiz world.

"Their lives are typically very busy, so spending time together while not working has been ­something they have both embraced."

It was previously claimed the 'Night Manager' actor had grown more private about his personal life following the scrutiny of his brief romance with Taylor Swift in 2016.

A source said: "Tom really has fallen for Zawe in a big way....

But he is so paranoid about his private life since his relationship with Taylor that he has gone to great lengths to keep this under wraps.

"Tom and Zawe spent Easter together renovating his house in England.

They now spend most weekends together and going for long walks with his dog. He thinks this could be the love of his life - he's ready to settle down."