2 Days in New York - 2012

This movie is the sequel to 2 Days in Paris (2007) and takes place in New York where Marion and her new boyfriend Mingus (Chris Rock) live. Each had a child from a previous relationship, so they are now a reconstituted family. 2 Days in New York tells the story of the two-day visit of her father, her sister and her boyfriend Manu to the Big Apple. Manu used to date Marion, so it makes things a bit awkward for Mingus from the beginning. As Delpy's mother played her own part in the movie but died in the meantime, Delpy decided to add her death to the script. 
In the movie, Marion prepares her own exhibition of photographs and invites her family to the vernissage. The encounter between Mingus and Marion's family members (and Manu), is a real culture shock. Once again, Delpy emphasizes stereotypes about French and American people, making her father appear like a unhinged man and her sister a very juvenile and sexually liberated woman.
2 Days in New York is as funny as 2 Days in Paris, even though Delpy's mother's death and her recent experience of pregnancy and motherhood made her write a script with main characters a little less carefree.

Le Skylab - 2011

Le Skylab is the only full-length movie that Julie Delpy wrote completely in French. The story takes place in July 1979 near to Saint-Malo in Brittany, in a big house where a whole big family gathered to celebrate the grandmother's birthday. The latter had six children, one of whom is called Jean. Jean and his wife Anna, Julie Delpy, are street artists. They seem to live a bohemian lifestyle with their young daughter Albertine, and to be able to talk about anything with each other.
The movie is called Skylab referring to the name of the NASA space station that orbited the Earth from 1973 to 1979. In 1979, it threatened to fall on Brittany and at the time, every French channel spoke about it. It finally disintegrated by entering the atmosphere and his bits fell into the Indian Ocean.
Julie Delpy wrote this comedy, which is all about family, after her mother's death.

The Countess - 2009

Julie Delpy got more involved than ever in this movie dated of 2009. Indeed, she wrote it, directed it, composed the music, and played the main part of the Hungarian countess Erzsébet Báthory. The latter was born in 1560 and died in 1614. After the death of her husband, the count Ferenc Nadasky, she became very powerful and met a very young man of noble birth at a ball called István Thurzó. As she had fallen passionately in love with him, when she received a (fake) letter signed by the name of the loved one saying that he was getting married with another woman that he loved more than anything, she got deeply depressed.
Since then, she showed signs of probable insanity. She persuaded herself that if István is no longer in love with her, it is because she looks too old for him. Soon, she will start to order the murders of many young virgin girls, convinced that, by putting their blood in contact with her own skin, it would make her to look younger.
At the end of her life and the end of the movie, we can see her being heard for her crimes and finally punished. Her sentence is to be walled into her own room forever, but she will prefer kill herself than living like this for the rest of her life.
This movie was said to be an ode to melancholia and dark romanticism. It is very different from Julie Delpy's previous movies which are colorful comedies, but she explained that she had been fascinated by this passionate woman who has left a lasting impression in the History with her criminal insanity and sadism.
According to me, the link between the main character of The Countess and the main characters of Delpy's other movies is the fact they all are strong and passionate women.