Harry Styles to make solo 'Saturday Night Live' debut on April 15

It's real. It's happening. Harry Styles has risen.

The ex-One Direction star is officially slated to take the "Saturday Night Live" stage as the show's musical guest on April 15. He'll appear alongside host Jimmy Fallon, the show announced via Twitter on Tuesday -- and Fallon himself couldn't be more excited.

"So excited!!! A young heartthrob and Harry Styles will be on SNL together April 15th!" Fallon tweeted, adding #WhenHarryMetJimmy.

Fans expected Styles to launch a solo career, but until just this past week, the timeline was unknown. Styles has stayed hushed about nearly every detail, keeping a low profile both in person and online: He's rarely been snapped by paparazzi in the past year, and he's all but disappeared from social media.

Then, a few days ago, an unexpected TV ad offered a glimpse into his new project. The cryptic video shows just a flash of Styles' green eyes before text reading, "April 7," the date his first single will drop.

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Harry Styles out and about
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Harry Styles out and about
LONDON, ENGLAND - OCTOBER 06: Harry Styles Sighting in South Kensington on October 6, 2016 in London, England. (Photo by Mark Robert Milan/GC Images)
LONDON, ENGLAND - MARCH 10: (EXCLUSIVE COVERAGE) Harry Styles is pictured getting a parking ticket on March 10th, 2016 in London,England. (Photo by Crowder/Legge/GC Images)
LOS ANGELES, CA - JANUARY 20: Harry Styles is seen at LAX on January 20, 2016 in Los Angeles, California. (Photo by GVK/Bauer-Griffin/GC Images)
BEVERLY HILLS, CA - FEBRUARY 14: Recording artist Harry Styles attends the 2016 Pre-GRAMMY Gala and Salute to Industry Icons honoring Irving Azoff at The Beverly Hilton Hotel on February 14, 2016 in Beverly Hills, California. (Photo by Lester Cohen/WireImage)
LOS ANGELES, CA - DECEMBER 31: (L-R) Singers Liam Payne, Niall Horan, Louis Tomlinson and Harry Styles of One Direction attend Dick Clark's New Year's Rockin' Eve with Ryan Seacrest 2016 on December 31, 2015 in Los Angeles, CA. (Photo by Mark Davis/DCNYRE2016/Getty Images for dcp)
BIRMINGHAM, ENGLAND - DECEMBER 10: Liam Payne, Louis Tomlinson, Harry Styles and Niall Horan of One Direction attend the BBC Music Awards at Genting Arena on December 10, 2015 in Birmingham, England. (Photo by Karwai Tang/WireImage)
LOS ANGELES, CA - DECEMBER 04: Recording artist Harry Styles of One Direction performs at 102.7 KIIS FM's Jingle Ball 2015 presented by Capital One at Staples Center on December 4, 2015 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LOS ANGELES, CA - DECEMBER 04: Harry Styles arrives at the 102.7 KIIS FM's Jingle Ball at Staples Center on December 4, 2015 in Los Angeles, California. (Photo by Steve Granitz/WireImage)
LOS ANGELES, CA - DECEMBER 04: Recording artists Harry Styles (L) and Liam Payne of One Direction perform onstage during 102.7 KIIS FM�s Jingle Ball 2015 Presented by Capital One at STAPLES CENTER on December 4, 2015 in Los Angeles, California. (Photo by Kevin Winter/Getty Images for iHeartMedia)
LOS ANGELES, CA - DECEMBER 04: Harry Styles of One Direction performs during the KIIS FM� Jingle Ball 2015 presented by Capital One on December 4, 2015 in Los Angeles, California. (Photo by JB Lacroix/WireImage)
LOS ANGELES, CA - DECEMBER 04: (EDITORS NOTE: IMAGE WAS PROCESSED USING DIGITAL FILTERS) Recording artist Harry Styles of music group One Direction performs onstage during 102.7 KIIS FMÂs Jingle Ball 2015 Presented by Capital One at STAPLES CENTER on December 4, 2015 in Los Angeles, California. (Photo by Christopher Polk/Getty Images for iHeartMedia)
SAN JOSE, CA - DECEMBER 02: Singer Harry Styles of One Direction performs during the 6th Annual 99.7 NOW! Triple Ho Show at SAP Center on December 2, 2015 in San Jose, California. (Photo by C Flanigan/FilmMagic)
DALLAS, TX - DECEMBER 01: Niall Horan, Harry Styles, Liam Payne, and Louis Tomlinson of One Direction attend 106.1 KISS FM's Jingle Ball at American Airlines Center on December 1, 2015 in Dallas, Texas. (Photo by Taylor Hill/FilmMagic)
MEXICO CITY, MEXICO - NOVEMBER 25: (L-R) Harry Styles, Niall Horan, Liam Payne and Louis Tomlinson of One Direction attend a press conference and photo call to promote One Direction's album Made in the A.M. at Four Seasons Hotel on November 25, 2015 in Mexico City, Mexico. (Photo by Victor Chavez/WireImage)
LOS ANGELES, CA - NOVEMBER 22: Singer Harry Styles of One Direction arrives at the 2015 American Music Awards at Microsoft Theater on November 22, 2015 in Los Angeles, California. (Photo by Axelle/Bauer-Griffin/FilmMagic)
LOS ANGELES, CA - NOVEMBER 22: (L-R) Recording artists Niall Horan, Harry Styles, Louis Tomlinson and Liam Payne of One Direction attend the 2015 American Music Awards at Microsoft Theater on November 22, 2015 in Los Angeles, California. (Photo by Jeff Kravitz/AMA2015/FilmMagic)
LOS ANGELES, CA - NOVEMBER 19: Harry Styles of the band 'One Direction' is seen performing on 'Jimmy Kimmel Live' on November 19, 2015 in Los Angeles, California. (Photo by RB/Bauer-Griffin/GC Images)
LONDON, ENGLAND - NOVEMBER 12: Harry Styles of One Direction leaves The Maida Vale Studios on November 12, 2015 in London, England. (Photo by SAV/GC Images)
LONDON, ENGLAND - SEPTEMBER 22: Harry Styles of One Direction performs on stage as part of Apple Music Festival at The Roundhouse on September 22, 2015 in London, England. (Photo by Christie Goodwin/Redferns)
LONDON, ENGLAND - SEPTEMBER 21: Harry Styles at Lou Lou's club on September 21, 2015 in London, England. (Photo by Mark Robert Milan/GC Images)
DETROIT, MI - AUGUST 29: Harry Styles of One Direction performs in support of the On The Road Again Tour at Ford Field on August 29, 2015 in Detroit, Michigan. (Photo by Scott Legato/Getty Images)
NEW YORK - AUGUST 04: (L-R) Harry Styles, Liam Payne, Niall Horan and Louis Tomlinson of One Direction perform on 'Good Morning America' on August 04, 2015 in New York City. PHOTOGRAPH BY Photo Image Press / Barcroft Media (Photo credit should read Photo Image Press / Barcroft Med via Getty Images)
SATURDAY NIGHT LIVE -- 'Jimmy Fallon' Episode 1722 -- Pictured: Musical guest Harry Styles performs 'Sign of the Times' on April 15, 2017 -- (Photo by: Will Heath/NBC/NBCU Photo Bank via Getty Images)
SATURDAY NIGHT LIVE -- 'Jimmy Fallon' Episode 1722 -- Pictured: (l-r) Musical guest Harry Styles poses with host Jimmy Fallon in Studio 8H on April 13, 2017 -- (Photo by: Rosalind O'Connor/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - APRIL 18: Harry Styles is seen at Madison Square Garden on April 18, 2017 in New York City. (Photo by TM/NHL/Getty Images)
PARIS, FRANCE - APRIL 26: Singer Harry Styles arrives at Gare du Nord station on April 26, 2017 in Paris, France. (Photo by Marc Piasecki/GC Images)
BROOKLYN, NY - MAY 08: Harry Styles performs on stage at the iHeartRadio Album Release Party on May 8, 2017 at Rough Trade NYC in Brooklyn, New York (Photo by Dimitrios Kambouris/Getty Images for iHeart Media)
NEW YORK, NY - MAY 09: Singer Harry Styles performs live on NBC's 'Today' at Rockefeller Plaza on May 9, 2017 in New York City. (Photo by Matthew Eisman/FilmMagic)
LONDON, ENGLAND - MAY 12: Harry Styles seen at BBC Radio 2 Studios promoting his new album on May 12, 2017 in London, England. (Photo by Neil Mockford/GC Images)
LONDON, ENGLAND - MAY 12: Harry Styles sighting at BBC studios on May 12, 2017 in London, England. (Photo by GOR/GC Images)
LONDON, ENGLAND - MAY 13: Harry Styles leaving a secret gig at the Garage in Islington on May 13, 2017 in London, England. (Photo by GORC/GC Images)
LOS ANGELES - MAY 15: Harry Styles performs during 'The Late Late Show with James Corden,' Monday, May 15, 2017 (12:35 PM-1:37 AM ET/PT) On The CBS Television Network. (Photo by Terence Patrick/CBS via Getty Images)
LOS ANGELES - MAY 16: Harry Styles performs during 'The Late Late Show with James Corden,' Tuesday, May 16, 2017 (12:35 PM-1:37 AM ET/PT) On The CBS Television Network. (Photo by Terence Patrick/CBS via Getty Images)
WEST HOLLYWOOD, CA - MAY 17: Harry Styles poses for SiriusXM from The Roxy Theatre on May 17, 2017 in West Hollywood, California. (Photo by Emma McIntyre/Getty Images for SiriusXM)
LONDON, ENGLAND - JULY 13: Harry Styles arrives at the 'Dunkirk' World Premiere at Odeon Leicester Square on July 13, 2017 in London, England. (Photo by Tristan Fewings/Getty Images)
LONDON, ENGLAND - JULY 13: (L-R) Actors Harry Styles and Aneurin Barnard and Prince Harry attend the 'Dunkirk' World Premiere at Odeon Leicester Square on July 13, 2017 in London, England. (Photo by Eamonn M. McCormack - WPA Pool/Getty Images)
(From L) British actor Tom Glynn-Carney, British actor Fionn Whitehead, British film producer Emma Thomas, British-American film director Christopher Nolan, British singer, songwriter and actor Harry Styles and British actor Jack Lowden pose on July 16, 2017, during a photo-call in Dunkirk, ahead of the release of the movie 'Dunkirk' on July 19, 2017. / AFP PHOTO / FRANCOIS LO PRESTI (Photo credit should read FRANCOIS LO PRESTI/AFP/Getty Images)
British singer, songwriter and actor Harry Styles poses on July 16, 2017, during a photo-call at the cinema Ocine in Dunkirk, for the premier of the movie 'Dunkirk'. The movie 'Dunkirk' will be released on July 19, 2017. / AFP PHOTO / FRANCOIS LO PRESTI (Photo credit should read FRANCOIS LO PRESTI/AFP/Getty Images)
NEW YORK, NY - JULY 18: Harry Styles attends the 'DUNKIRK' New York Premiere on July 18, 2017 in New York City. (Photo by Jamie McCarthy/Getty Images)
NEW YORK, NEW YORK - JULY 18: Harry Styles attends the 'DUNKIRK' premiere in New York City. (Photo by Kevin Mazur/Getty Images)
NEW YORK, NY - JULY 19: Harry Styles and host Jimmy Fallon visit 'The Tonight Show Starring Jimmy Fallon' at Rockefeller Center on July 19, 2017 in New York City. (Photo by J. Kempin/Getty Images for NBC)
TODAY -- Pictured: Harry Styles and Fionn Whitehead on Wednesday, July 19, 2017 -- (Photo by: Nathan Congleton/NBC/NBCU Photo Bank via Getty Images)
NEW YORK, NY - JULY 19: (EXCLUSIVE COVERAGE) Harry Styles visits The Elvis Duran Z100 Morning Show at Z100 Studio on July 19, 2017 in New York City. (Photo by Gary Gershoff/Getty Images)
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Styles is set to become a multi-hyphenate in Hollywood as he also has a role in Christopher Nolan's upcoming film "Dunkirk," which premieres this summer.

The Styles updates come as a gift to millions of fans still reeling from One Direction's "hiatus," which began a full year ago. Members Louis Tomlinson and Niall Horan have both embarked on solo ventures, as has ex-member Zayn Malik, who quit the band in 2015. Liam Payne, while also expected to create his own music, is a bit preoccupied: He just welcomed a baby with girlfriend Cheryl Cole.

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