Days before the release of "To Be Takei," "Star Trek" star George Takei has shared details of his life, particularly his career and relationship with his husband and manager, Brad Altman.

Directed by Jennifer M. Kroot, "To Be Takei" will be released in select theaters on Aug. 22. The documentary will also be available on VOD Platforms and iTunes.  

Having starred in "Star Trek: The Original Series" and its six sequels, the 77-year-old veteran actor admitted he hesitated to film a documentary about his life at first.

"We've had many approaches, and we don't want a vanity project. You know, so many actors have documentaries done that make them look more glamorous, more intelligent, more wonderful," Takei told CBS News.

"We wanted essentially to share the normality of our lives, my husband and I, because people have stereotypes and images of the same-sex marriage or union, so we wanted to accomplish that, the normality," Takei added.

In an exclusive clip from the documentary, Altman is seen supporting Takei in his preparation for his performance in the musical "Allegiance," in which he co-stars with original "Miss Saigon" Lea Salonga, Telly Leung, Paul Nakauchi, Marcus Choi, Allie Trim and Kenneth Lee among others.

Watch the entire "To Be Takei" clip here:

According to Takei, he had a "very painful" first-hand experience of discrimination when he was getting an award from the emperor of Japan, Emperor Akihito, in the Imperial Palace with others "being honored from various parts of the world and they had their spouses with them."

"Only Brad, my partner at that time, had to stay on the bus that brought us to the Imperial Palace. I started my life with horrific discrimination, if you want to call it that," Takei recalled.

Takei and Altman will launch YouTube series entitled "It Takeis Two," which is set to debut later this year, Out Magazine has learned.

At age 68, Takei publicly announced he was gay in 2005 as a response to the veto of legislation of the then Governor of California Arnold Schwarzenegger to legalize marriage for same-sex couples in the state, The Daily Beast reported.