ewan mcgregor
Ewan McGregor (R) and Eve Mavrakis during happier times (File photo) Getty

Ewan McGregor's 15-year-old daughter Esther Rose has penned an emotional song in which she slams her father for his new romance with actress Mary Elizabeth Winstead.

In the song she says "seeing those pictures, they're making me cry", referring to snaps of the actor and his Fargo co-star Winstead that appeared on the Internet last October.

McGregor and Eve Mavrakis' split in May 2017 came as a shock as they have been married since 1995. They share four children – Clara Mathilde, 21, Jamyan, 16, Esther Rose, 15, and Anouk, 6.

Esther Rose shared a clip in Instagram of herself belting out her song titled Made You A Man.

Strumming an acoustic guitar, she starts her song with the line, "Waking up so slowly... I'm taking my time. I read some dumbs**t that I found online."

She continues, "Seeing those pictures... They're making me cry. Happy birthday to me, am I right?"

"And I don't know to forgive... I don't know if I can.... Ruining me. Show me your man. And I don't know to forgive... Don't know if I can... Ruining me. Show me your man."

Rose's heartbreaking tune comes just days after Daily Mail reported that her mother, Mavrakis, was not pleased with McGregor's Golden Globes Awards acceptance speech, wherein he thanked both his estranged wife and his girlfriend. McGregor won the best performance by an actor in a limited series or motion picture for television for his role in Fargo.

"No, I did not like his speech," she told the publication. When prodded to reveal why, she said, "Why not? For the same reasons you are here asking me about it. I am not going to say anymore."

In November, it was reported that Mavrakis was "heartbroken" over McGregor romancing Winstead, who is 33 years old.

"Mary went to the house once and met Eve and the kids over dinner. She was very cordial. It seemed logical she should get to know Ewan and the family," a source previously told The Sun.

"She is doing her best to handle it with dignity. But what makes it worse is she has been told Mary Elizabeth had a teenage crush on Ewan. I'm sure a lot of people did but they didn't go and have an affair with him."