Isla Fisher at New York Premiere of 'Confessions of a Shopaholic' at the Ziegfeld Theatre - Arrivals, New York City, USA - 05.02.09

The Aussie Wedding Crashers star plans to wed observant Jew Sacha Baron Cohen soon - and offered to become Jewish as a mark of respect to her fiance and his parents.

And she's glad she took the faith - because she loves the traditions of Judaism.

Fisher says, "I sort of fell in love with Judaism. I love the rituals and it's all about family, which is what I believe to be the secret to happiness."

And though the couple has no wedding date set, new mum Fisher insists it will be soon: "I do have to get married."

And she's already making big plans when it comes to her wedding dress: "I'd love to make it myself."

Source: WENN