Cory Booker is preparing to take the oath—of marriage.

The New Jersey Senator announced that he and Alexis Lewis are engaged after a year and a half of dating, expressing his joy about his new fiancée as he shared several photos of his tropical proposal.

“Alexis is one of the greatest unearned blessings of my life,” he wrote in a post on Instagram on September 2. “She has transformed me, helping me to ground and center my inner life, and discover the joys of building a nurturing home with someone you love.”

In the photos, Booker, 56, wore a navy blue shirt and beige pants as he got down on one knee for Lewis, who opted for a black top and polka-dot skirt. The couple both wore leis for the romantic occasion, with the groom-to-be donning a long green garland while his bride was adorned in a wreath bearing pink and orange flowers.

“I am savoring the soul-affirming wonder of everyday life with my partner, best friend, and now my fiancée,” Booker continued. “We are excited for this journey ahead, having so much fun, and feeling deeply grateful for the love, support, and energy so many of you have shared with us. We are truly blessed to be surrounded by such a beautiful community lifting us in love and commitment.”