It was only in early June that the 30 year-old English actress revealed that she was pregnant with her first child with Mumford & Sons lead singer Marcus Mumford, and only a few days after it was announced that Carey Mulligan's baby had been born, the busy star is already back in the red carpet!

Hours after it was revealed that Carey Mulligan's baby had been born, the actress was already putting on some high heels and heading up for the London Film Festival, where she met up with her "Suffragette" co-stars for the official showing of the film about women's right to vote in her native United Kingdom.

According to People Magazine, right after the birth of Carey Mulligan's baby, the Oscar-nominated actress wore Chanel Couture for the big night, opting for a ruffled dress in mauve with black stilettos and low-key makeup - still very much looking like a movie star after having given birth!

As Hello! Magazine reports, although the birth of Carey Mulligan's baby was only confirmed over the past week, it's being reported that the English-born star gave birth a few weeks back, in September - although neither the actress nor her rocker husband have confirmed things either way.

According to Sydney Morning Herald, in fact, it is believed that the reason the "Great Gatsby" star missed the official premiere of her film on September 4, as she was too close to the due date of Carey Mulligan's baby and she decided to stay home instead of venturing to the red carpet when she was about to give birth.

Mulligan and Mumford have been married since the spring of 2012, after the actress had reportedly dated Shia LaBeouf and Eddie Redmayne; before meeting the actress, the "I Will Wait" rocker date Laura Marling.

Congratulations to both stars on Carey Mulligan's baby!