"I honesty never thought, as a gay man, I could be a dad," confesses young father Mark Hoig, as he and his partner Ryan Rostine feed breakfast to their infant daughter. He chokes up sharing the story of how their pastor encouraged their wish to have a child saying they'd "bring more love into the world."

Mark, Ryan and their daughter are just one of hundreds of families who set sail on an historic seven-day cruise to the Caribbean on one of the largest cruise ships in the world. In the process these families found an oasis where they could celebrate their individuality and shared ideals in a safe and supportive environment.

The HBO Documentary 'All Aboard! Rosie's Family Cruise' chronicles this historic undertaking, offering a glimpse of a society shaped by a truly diverse, inclusive network of families. The feature-length documentary which will debut on HBO April 6th, first caught the public's eye in January when it premiered at the Sundance Film Festival.

Among the cruise participants featured in 'All Aboard!' are the O'Donnell clan, former NFL Player Esera Tualo, and Wayne Steinman and Sal Lacullo, a pioneering middle-aged male couple who adopted a baby girl 17 years ago and now face an empty nest as their daughter Hope prepares for college. Also on on board are Amy Coutright and Rhonda Sherpy, a lesbian couple who unexpectedly connect with a possible donor father for their long-awaited child, and Charlie Paragian and Danny Sernekos, New Jersey men who wed at sea in the presence of their five children - all adopted from foster care.

It is personal narratives like these that make this documentary so compelling. Says director and producer Shari Cookson, "I feel honored to have had the opportunity to capture a special week in the lives of these families as they experienced a sense of community many of them have never known before. Rosie and Kelli O'Donnell say that what defines a family is love, and the families in this film are undeniable proof of that."

Rosie O'Donnell adds "Shari Cookson managed to perfectly and honestly portray the joy, the drama and the sheer crazy fun of this amazing adventure Kelli and I shared with hundreds of wonderful families. Best of all, the film reminds us that families can come in all shapes and sizes, and that the things we all have in common far outweigh our differences."