So. Many. Twins.
Here's a look back the biggest celebrity births of the year.
Jackson and her husband, Wissam Al Mana, welcomed their first son, Eissa Al Mana, on January 3, 2017.
The couple welcomed triplets in early January.
The couple welcomed their third child, a son named Zen, in February.
In February, the Today Show host announced she had adopted a little girl named Haley Joy Kotb.
The Wonder Woman star and her husband, welcomed their second daughter, Maya, in March.
The couple welcomed their second child, a daughter named Louise, in March.
In March, the couple welcomed their second child together, a daughter named Amalia.
The couple's daughter, Bari Najma, was born days before the actor won an Oscar for his performance in Moonlight.
The couple welcomed their second child, son Hal, on March 3.
The couple welcomed a baby girl in March, but have chosen not to share their daughter's name publicly.
The couple welcomed their first child, a son named Bear, on March 22.
In April, the couple welcomed daughter Lea de Seine Shayk Cooper
The couple welcomed their first child together, daughter Sienna, in April.
In May, the host announced the birth of his son, Billy, and got very emotional on air while discussing his health issues.
The couple welcomed their second child, son Charlie Wolf, in May.
The power couple welcomed twins Ella and Alexander in June.
The couple welcomed twins Rumi and Sir in June and debuted them to the world in July.
The model and actor welcomed their first child, Jack, on June 24.
The actress and tattoo artist welcomed their second child, a son named Ozzy, in June.
The couple welcomed their son, William "Liam" Tell on July 5.
The couple welcomed their first child, daughter Bodhi Soleil Reed Somerhalder, on July 25.
The models welcomed daughter Gravity Blue Smith in July.
The Swedish royals welcomed their second son, Gabriel, in August.
The couple welcomed daughter Alexis Olympia Ohanian Jr. on September 1.
The couple welcomed son Gunner Stone on October 1.
The actors welcomed their second child, son Lazlo, in October.
The former Glee star welcomed son Revel in October.
The actress gave birth to twins Leo and Lenon on October 16.
The model and businessman welcomed their second child, a daughter named Elle, on October 20.
The musician and his wife welcomed their second daughter, Remy Anne, on October 22.
![LA Premiere Of Entertainment Studios' "47 Meters Down Uncaged" - Arrivals](https://hips.hearstapps.com/hmg-prod.s3.amazonaws.com/images/gettyimages-1167906097.jpg?crop=1.00xw:0.335xh;0,0.0375xh&resize=480:* "LA Premiere Of Entertainment Studios' "47 Meters Down Uncaged" - Arrivals")
![A Live Taping Of Nick Viall's New Show "The Viall Files" With Audience Q&A](https://hips.hearstapps.com/hmg-prod.s3.amazonaws.com/images/gettyimages-1134211978-copy-1564068096.jpg?crop=1.00xw:0.753xh;0,0.0831xh&resize=480:* "A Live Taping Of Nick Viall's New Show "The Viall Files" With Audience Q&A")