MailOnline reports that the singer, who recently performed a well-received Superbowl half time show, shares an image of her first baby with Jay-Z in the film, which is due to air this evening (February 16).
In the shot, Beyoncé holds Blue Ivy up and smiles as she looks at her. The tot has a full head of curly hair, while Beyoncé looks relaxed with little make-up and braided hair.
Other intimate moments in the film include a shot of Beyoncé's baby bump, as well as a video of the heavily-pregnant star posing naked.
The 'Halo' singer also reveals the heartache of experiencing a miscarriage before her pregnancy with Blue Ivy, saying: "It was the saddest thing I've ever been through."
She added: "My life is a journey... I had to go through my miscarriage, I believe I had to go through owning my company and managing myself... ultimately your independence comes from knowing who you are and you being happy with yourself."
Life Is But a Dream airs tonight on HBO. An interview with Oprah Winfrey on OWN airs at the same time.