Terry Richardson and Alexandra Bolotow are new parents to twins!

The 50-year-old photographer and his much-younger girlfriend, 32, welcomed twin boys named Rex and Roman on Saturday, March 19, the proud dad confirmed via Instagram.

"Watching this woman rock it through an insane delivery and push out our babies was the most intense, inspiring, exhilarating and humbling experience of my life. So blessed and grateful for this sweet family. Welcome to the world Rex and Roman," Terry captioned a sweet snapshot of Alexandra holding her newborn sons in the hospital.

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Terry and Alexandra β€” who previously worked as the photographer's assistant β€” announced they were expecting twins in October 2015. "This has been a difficult journey and we are so thankful to be surrounded by so much love and support from our friends and family, and some incredibly smart doctors!" Terry wrote on Instagram at the time.