Knocked Up star Katherine Heigl has given up her Mormon beliefs as she is "too lazy" to follow a religion.

The actress was born a Christian but her family converted to the Church of the Latter-Day Saints after the death of her older brother Jason when Heigl was seven years old.

And despite her strict Mormon upbringing, the star insists she has since abandoned the faith because she just doesn’t have enough time to devote herself fully to the practice.

She says, "I still love the theology of the Mormon religion and I think it is a wonderful way to grow up. But I think any real commitment to religion takes time, effort and energy.

"I just got really lazy and it’s hard to get yourself up on a Sunday morning."