Beyonce makes surprise pregnancy announcement on Instagram

Beyoncé shocked the world yet again on Wednesday by revealing that she's pregnant with twins.

The "Formation" singer shared a photo of herself holding her pregnant belly on Instagram while wearing a green veil, blue underwear and a bra top.

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The caption of the photo was written on behalf of her family, the Carters.

See photos of Beyoncé and her family:

29 PHOTOS
Blue Ivy Jay Z Beyonce
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Blue Ivy Jay Z Beyonce
INGLEWOOD, CA - AUGUST 24: (L-R) Blue Ivy Carter, recording artists Jay Z and Beyonce speak onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by MTV/MTV1415/Getty Images for MTV)
Janet and MJ
LOS ANGELES, CA - FEBRUARY 08: Recording artists Rihanna attends The 57th Annual GRAMMY Awards at STAPLES Center on February 8, 2015 in Los Angeles, California. (Photo by Jason Kempin/WireImage)
NEW YORK, NY - NOVEMBER 04: Beyonce Knowles and Blue Ivy Carter are seen in Midtown on November 4, 2014 in New York City. (Photo by Alo Ceballos/GC Images)
Happy Valentine's Day 🐝🐝💋💋
NEW YORK, NY - NOVEMBER 04: Beyonce Knowles and Blue Ivy Carter are seen in Midtown on November 4, 2014 in New York City. (Photo by Alo Ceballos/GC Images)
NEW YORK, NY - NOVEMBER 04: Beyonce and Blue Ivy Carter are seen on November 4, 2014 in New York City. (Photo by Alo Ceballos/GC Images)
Thank you San Fran! Your city is beautiful. It was the perfect place to complete the best tour of my life! Thank you to all the fans that supported our show. God bless🐝
NEW YORK, NY - DECEMBER 07: Beyonce Knowles, Jay-Z and Blue Ivy are seen on December 7, 2014 in New York City. (Photo by NCP/Star Max/GC Images)
NEW YORK, NY - NOVEMBER 04: Beyonce Knowles and Blue Ivy Carter are seen in Midtown on November 4, 2014 in New York City. (Photo by Alo Ceballos/GC Images)
INGLEWOOD, CA - AUGUST 24: (L-R) Blue Ivy Carter, recording artists Jay Z and Beyonce speak onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by MTV/MTV1415/Getty Images for MTV)
INGLEWOOD, CA - AUGUST 24: Blue Ivy Carter and Jay Z in the audience watching Beyonce perform during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Kevin Mazur/MTV1415/WireImage)
INGLEWOOD, CA - AUGUST 24: Blue Ivy Carter and Jay Z in the audience watching Beyonce perform during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Kevin Mazur/MTV1415/WireImage)
INGLEWOOD, CA - AUGUST 24: (L-R) Blue Ivy Carter, recording artists Jay Z, and Beyoncé performs onstage during the 2014 MTV Video Music Awards at The Forum on August 24, 2014 in Inglewood, California. (Photo by Jeff Kravitz/MTV1415/FilmMagic)
PARIS, FRANCE - JUNE 04: Jay Z and his baby Blue Ivy Carter arrive at the 'MEURICE' hotel on June 4, 2012 in Paris, France. (Photo by Marc Piasecki/FilmMagic)
NEW YORK CITY, NY - APRIL 12: Beyonce leaves her Midtown Manhattan office carrying her daughter Blue Ivy on April 12, 2012 in New York City, New York. (Photo by Josiah Kamau/BuzzFoto/FilmMagic)
NEW YORK, NY - MARCH 27: Beyonce Knowles and her daughter Blue Ivy Carter seen on the streets of Manhattan on March 27, 2012 in New York City. (Photo by James Devaney/WireImage)
Beyonce - BlackBerry Porsche P'9981
Beyonce poses with her three Grammys in the press room during the 57th annual Grammy Awards in Los Angeles, California on February 8, 2015. Beyonce won for Best R&B Song and Best R&B Performance with 'Drunk In Love,' her tale of marital bliss sung with her husband Jay-Z, as well as for the more technical Best Surround Sound Album. AFP PHOTO / FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
LOS ANGELES - FEBRUARY 8: Jay-Z and Beyonce during The 57th Annual Grammy Awards, Sunday, Feb. 8, 2015 (8:00-11:30 PM, live ET/delayed PT) at STAPLES Center in Los Angeles and broadcast on the CBS Television Network. (Photo by Francis Specker/CBS via Getty Images)
Beyonce poses with her three Grammys in the press room during the 57th annual Grammy Awards in Los Angeles, California on February 8, 2015. Beyonce won for Best R&B Song and Best R&B Performance with 'Drunk In Love,' her tale of marital bliss sung with her husband Jay-Z, as well as for the more technical Best Surround Sound Album. AFP PHOTO / FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
LOS ANGELES, CA - FEBRUARY 08: Recording artists Jay-Z (L) and Beyonce during The 57th Annual GRAMMY Awards at the STAPLES Center on February 8, 2015 in Los Angeles, California. (Photo by Lester Cohen/WireImage)
BEVERLY HILLS, CA - FEBRUARY 07: (Exclusive Coverage) Willow Smith, Beyonce and Jay Z attend the Roc Nation and Three Six Zero Pre-GRAMMY Brunch at Private Residence on February 7, 2015 in Beverly Hills, California. (Photo by Kevin Mazur/Getty Images For Roc Nation)
LOS ANGELES, CA - FEBRUARY 08: Recording artists Jay-Z, Beyonce (front) and Rita Ora (back R) during The 57th Annual GRAMMY Awards at the STAPLES Center on February 8, 2015 in Los Angeles, California. (Photo by Lester Cohen/WireImage)
BEVERLY HILLS, CA - FEBRUARY 07: (Exclusive Coverage) Beyonce and Jay Z attend the Roc Nation and Three Six Zero Pre-GRAMMY Brunch at Private Residence on February 7, 2015 in Beverly Hills, California. (Photo by Kevin Mazur/Getty Images For Roc Nation)
LOS ANGELES, CA - JANUARY 22: Recording artists Beyonce and Jay-Z attend a game between the Brooklyn Nets and Los Angeles Clippers on January 22, 2014 at STAPLES Center in Los Angeles, California. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and/or using this Photograph, user is consenting to the terms and conditions of the Getty Images License Agreement. Mandatory Copyright Notice: Copyright 2015 NBAE (Photo by Andrew D. Bernstein/NBAE via Getty Images)
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"We would like to share our love and happiness," she wrote. "We have been blessed two times over. We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes. - The Carters"

By "growing by two," Beyoncé is seemingly revealing that she's expecting twins.

These would be Beyoncé's second and third children with her husband, Jay-Z. They already have a 5-year-old daughter, Blue Ivy, together.

Before becoming pregnant with Blue, Beyoncé famously went through an emotional struggle to become pregnant and revealed in her HBO documentary, "Life Is But A Dream," that she had suffered a miscarriage.

"I picked out names," said at the time. "I envisioned what my child would look like."

She also revealed in the film that songwriting "was the best form of therapy for me, because it was the saddest thing I've ever been through." Fans of the singer believe that her song, "Heaven," could be one of the songs that was inspired by her devastating experience.

Beyoncé is scheduled to headline Coachella in early April, and it's unclear how her pregnancy will affect whether or not she'll still perform.

See more celebrity baby announcements of 2017:

13 PHOTOS
Celebrity pregnancy announcements 2017
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Celebrity pregnancy announcements 2017
We're so happy to announce that we are pregnant & in the process of adopting a child from Africa! Safe to say life… https://t.co/FRUJWwXE2m
We have a bun in the oven! 😍🍔 thank you @therealasialee for being my best friend amazing Wife and now awesome Mom t… https://t.co/m1ogQuIfv8
@playerstribune
beyonce schmonce
We would like to share our love and happiness. We have been blessed two times over. We are incredibly grateful that our family will be growing by two, and we thank you for your well wishes. - The Carters
Happy New Year! I have a feeling 2017 is going to be the best year yet...
so excited!! 😍 link in bio 💕
My Christmas gift came early this year, can't wait for next year! Best news I've ever received #CLOUD9 #excited #family #love #2017
Miracles are everywhere! Thanking God and everyone whose kindness and support helped more than you will ever know ❤️ #LoveHelpers 📸: @taili_song_roth
Round and round we go! I'm 15 weeks pregnant in this shot and I'm SO excited for our newest addition to the Goldblum family, arriving early April!!!❤️ #growingfamily #love
#comparingbellies after Israel had dinner 😂 #foodbelly #babybump
We are PREGNANT!!! Our sweet Baby Hehner is due this August. Of course I share so much more about our little #rainbowbaby with you all on my blog. (Jamie Otis.com/all-things-Jamie ) @people put the sweetest tribute together for our first born son - Johnathan. We love him so much and are so happy to know he's looking down from Heaven taking care of his little sister/brother. ❤️ Thank you @people, for honoring our first born while we celebrate this amazing miracle.💕 Link in bio. #pregnant #preggers #overjoyed #babylove PS forgive me for my unbuttoned jeans. I'm at that awkward stage where I don't quite fill out maternity jeans but I definitely don't fit in my regular clothes. 🤗🎉🙏🏼😍 #sohappy
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