Natalie Portman says her children are her "good luck charms".

Natalie Portman

Natalie Portman

The 35-year-old actress is currently expecting her second child with husband Benjamin Millepied and she won the Best Actress Oscar for her performance in 'Black Swan' in 2011 when she was pregnant with their son Aleph, now five, and whilst she admits she doesn't think her pregnancy won her the award, she does think her children are "miracles" who make her so happy.

She told Entertainment Tonight: "I think [children are] good luck charms in life. They're the best things. The best main miracles. I don't necessarily connect it [to winning an Oscar], but it is certainly a joy."

The Hollywood star first showed off her baby bump back in August, when she sported a pink one-shoulder dress on the red carpet at the premiere of her film 'Planetarium' at the Venice Film Festival.

'Planetarium' is due out in November and biopic 'Jackie' - in which she plays Jacqueline Kennedy, the wife of assassinated President John F. Kennedy - is coming in December.

Once Portman has baby number two she may have to re-think what acting jobs she takes on as she has previously admitted she finds it tough to juggle work and her home life.

She said: "I will never have the boredom or repetitiveness of an office.

"But every job takes me to a new place with a new schedule, and it requires a reinvention of ritual each time, even more so with a family.

"Every time I go on location, I have to figure out where to live, what activities are available for my son, how and when we will travel from our home base.

"When I'm not working. I'm pretty much exclusively with my family, so my rituals have to do with school, meal preparation, play dates, bedtime."