George Takei (left) and Brad Altman
Gil Kaan/Splash News
's George Takei is one step closer to the altar.
The 71-year-old actor and longtime partner Brad Altman, 54, received a marriage license from the City of West Hollywood on Tuesday morning, becoming one of the first gay Californians to obtain a license since the state Supreme Court overturned a ban on same-sex marriages last month.
"We are first and foremost beyond delighted!" an ecstatic Takei told PEOPLE minutes after he obtained the license. "It's a landmark day."
Just days after the California ruling, Takei announced his plans to marry
Altman, his partner of 21 years. The couple plan to wed on September 14 in front of family and friends, including some of Takei's Star Trek cast mates
Immediately after obtaining their marriage license, "I started singing 'One Singular Sensation,'" Takei said. "(Brad) said 'I love you' and I looked at him and said, 'I love you.'"
Takei and Altman were the first couple to receive a marriage license from West Hollywood, a city that previously did not issue licenses to gay or straight couples. The wedding will take place at the Japanese American National Museum in Los Angeles.
Additional reporting by SUSAN MANDEL