Pregnant Keri Russell hides baby bump with coat and scarf as she and co-star beau Matthew Rhys film scenes for The Americans

Keri Russell and Mathew Rhys were seen shooting scenes for their FX series The Americans on location in Brooklyn on Tuesday.

The real-life couple, who play married KGB sleeper agents in the drama, seemed focused on the work as they filmed in the borough's Prospect Park.

Russell, 39, was dressed in a coat and scarf for some scenes and in a long baggy coat for others that helped to hide the fact that she's pregnant with her third child.

Scroll down for video 

On location: Matthew Rhys and Keri Russell appeared focused on the work as they waited to film scenes for their FX Cold War drama The Americans in Brooklyn on Tuesday

On location: Matthew Rhys and Keri Russell appeared focused on the work as they waited to film scenes for their FX Cold War drama The Americans in Brooklyn on Tuesday

Russell and Rhys, 41, started dating after being cast together in the show and in January they confirmed they're expecting their first child together this summer.

The actress already has two children - son Rover, eight, and daughter Willa, four - from her marriage to Shane Deary, from whom she split in 2013. 

Her pregnancy is not being included as part of the show and the crew has had to work around her growing baby bump during production. 

Life mirrored art: The two, who play a married couple on the show, started dating in 2013 while filming the first season 

Life mirrored art: The two, who play a married couple on the show, started dating in 2013 while filming the first season 

Disguised: Russell is four months pregnant but the pregnancy is not being written into the show. A baggy coat and a woolen scarf helped hide her baby bump while filming

Disguised: Russell is four months pregnant but the pregnancy is not being written into the show. A baggy coat and a woolen scarf helped hide her baby bump while filming

Costume: The actress was almost unrecognizable in spectacles with a beret pulled down over her hair and knee-high brown boots
Costume: The actress was almost unrecognizable in spectacles with a beret pulled down over her hair and knee-high brown boots

Costume: The actress was almost unrecognizable in spectacles with a beret pulled down over her hair and knee-high brown boots 

Pregnant: Russell, 39, confirmed in January that she's expecting a baby with her co-star Rhys, 41

Pregnant: Russell, 39, confirmed in January that she's expecting a baby with her co-star Rhys, 41

Strategic costume: In another scene Tuesday, the actress wore a long coat over wide-legged trousers to hide her pregnancy
Strategic costume: In another scene Tuesday, the actress wore a long coat over wide-legged trousers to hide her pregnancy

Strategic costume: In another scene Tuesday, the actress wore a long coat over wide-legged trousers to hide her pregnancy

For Rhys, the arrival of his and his co-star's baby will make him a first-time father.

The Welsh actor has never married but was once in a relationship with British actress Sienna Miller.

In The Americans, set during the Cold War in the early 1980s, the acting duo play Soviet KGB officers posing as an American married couple Elizabeth and Philip Jennings.

They live in the suburbs of Washington, D.C. where they raise their two children.

Season Four of The Americans will debut on FX on March 16. 

On set romance: The acting pair started dating after being cast on the show in 2013. Russell has two children with ex-husband Shane Deary from whom she split in 2013
On set romance: The acting pair started dating after being cast on the show in 2013. Russell has two children with ex-husband Shane Deary from whom she split in 2013

On set romance: Life imitated art for the acting pair, who are now on season four of The Americans

Action: The Welsh actor was also seen shooting scenes in the same location in character as a KGB sleeper operative in 1980's America

Action: The Welsh actor was also seen shooting scenes in the same location in character as a KGB sleeper operative in 1980's America

Hit show: The critically-acclaimed FX series has been a ratings winner for the cable network 

Hit show: The critically-acclaimed FX series has been a ratings winner for the cable network 

Dressed down: Before shooting her scenes, Russell was spotted chatting with a crew member while wearing cropped leggings with boots and a fluffy green coat

Dressed down: Before shooting her scenes, Russell was spotted chatting with a crew member while wearing cropped leggings with boots and a fluffy green coat

Close to home: The couple actually live in Brooklyn, near to where they were filming. The baby will be the first child for Rhys; Russell has two children with ex-husband Shane Deary from whom she split in 2013

Close to home: The couple actually live in Brooklyn, near to where they were filming. The baby will be the first child for Rhys; Russell has two children with ex-husband Shane Deary from whom she split in 2013

The comments below have not been moderated.

The views expressed in the contents above are those of our users and do not necessarily reflect the views of MailOnline.

By posting your comment you agree to our house rules.

Who is this week's top commenter? Find out now