Cory Booker on Thursday was sworn into the U.S. Senate.

The Democratic Booker is the first African-American senator from New Jersey and is a strong supporter of LGBT rights.

The oath was administered by Vice President Joe Biden. Booker also met with President Barack Obama in the White House Oval Office. (The video is embedded on this page. Visit our video library for more videos.)

“10 minutes to swearing in,” Booker tweeted before the ceremony. “Still in holding room. The bible I'm using is one given to me by my mother & family for my 2006 Mayoral swearing in.”

Booker, the former mayor of Newark, captured 55 percent of the vote to Republican Steve Lonegan's 44 percent during a special election held on October 16.

According to Gannett, Booker cast his first vote as a senator immediately following his swearing in.

Last October, Booker headlined the Human Rights Campaign's (HRC) annual National Dinner. In addressing the estimated 3,000 attendees, Booker said that he was proud of Obama's endorsement of gay marriage.

“I'm so proud of my president for all he has done in this cause,” Booker said.

(Related: After suggesting Cory Booker is gay, Steve Lonegan staffer fired.)