Liv Tyler (finally) confirms she's engaged to David Gardner

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Liv Tyler Confirms Engagement to David Gardner

Now that's a rock!

Liv Tyler officially confirmed her engagement on Instagram after ET announced the news in September. She also posted a sweet message to her fiancé, David Gardner.

PHOTOS: Liv Tyler Is Engaged -- See the Ring!

"Crazy about my man!!!!! sweet sweet daddy , friend , fiancé," she captioned the image. "Thank you !!!!!! Grateful"

The adorable couple wore all black and matching smiles in the photo.

Although the pair is just announcing the big news now, ET learned the couple has been engaged since December but kept the news private.

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Liv Tyler (finally) confirms she's engaged to David Gardner
LONDON, ENGLAND - NOVEMBER 23: Liv Tyler (L) and Dave Gardner attend a drinks reception at the British Fashion Awards in partnership with Swarovski at the London Coliseum on November 23, 2015 in London, England. (Photo by David M. Benett/Dave Benett/Getty Images)
NEW YORK, NY - OCTOBER 30: Liv Tyler, David Gardner and Sailor Gene Gardner are seen in the West Village on October 30, 2015 in New York City. (Photo by Alo Ceballos/GC Images)
LONDON, ENGLAND - APRIL 23: Dave Gardner (L) and Liv Tyler attend as Audi hosts the opening night performance of 'La Fille Mal Gardee' at The Royal Opera House on April 23, 2015 in London, England. (Photo by David M. Benett/Getty Images for Audi)
Liv Tyler, left, Justin Theroux and Amy Brenneman attend HBO's "The Leftovers" season premiere at the NYU Skirball Center on Monday, June 23, 2014 in New York. (Photo by Evan Agostini/Invision/AP)
WATCH WHAT HAPPENS LIVE -- Pictured: Liv Tyler -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
NEW YORK, NY - FEBRUARY 20: Amy Brenneman and Liv Tyler seen filming 'The Leftovers' on February 20, 2014 in Harrison, New York. (Photo by Steve Sands/GC Images)
THE LORD OF THE RINGS: THE TWO TOWERS (2002) VIGGO MORTENSEN, ARAGORN, LIV TYLER, ARWEN TWRS 002 402
NEW YORK, NY - JANUARY 27: Actress Liv Tyler and Milo Langdon are seen in Soho on January 27, 2014 in New York City. (Photo by Raymond Hall/FilmMagic)
NEW YORK, NY - FEBRUARY 20: Liv Tyler seen filming 'The Leftovers' on February 20, 2014 in Harrison, New York. (Photo by Steve Sands/GC Images)
Kate Moss and Liv Tyler during Beck Concert and Party at The Roxy, NY - September 15, 1998 at The Roxy in New York, New York, United States. (Photo by Ke.Mazur/WireImage)
PARIS, FRANCE - OCTOBER 01: Liv Tyler attends the Miu Miu show as part of the Paris Fashion Week Womenswear Spring/Summer 2015 on October 1, 2014 in Paris, France. (Photo by Pascal Le Segretain/Getty Images)
LONDON, UNITED KINGDOM - AUGUST 15: Liv Tyler is seen arriving at shorditch House on August 15, 2014 in London, England. (Photo by Niki Nikolova/GC Images)
LATE NIGHT WITH JIMMY FALLON -- Episode 686 -- Pictured: (l-r) Liv Tyler, Jimmy Fallon in the 'Star Makerz' skit -- (Photo by: Lloyd Bishop/NBC/NBCU Photo Bank via Getty Images)
Fashion model Kate Moss walking in London with actress Liv Tyler, 28th April 1998. (Photo by Dave Benett/Getty Images)
WATCH WHAT HAPPENS LIVE -- Pictured: Liv Tyler -- (Photo by: Charles Sykes/Bravo/NBCU Photo Bank via Getty Images)
NEW YORK, NY - JULY 15: Actress Liv Tyler is seen on July 15, 2014 in New York City. (Photo by Patricia Schlein/Star Max/GC Images)
NEW YORK, NY - JUNE 23: Actress Liv Tyler attends 'The Leftovers' premiere at NYU Skirball Center on June 23, 2014 in New York City. (Photo by Taylor Hill/FilmMagic)
NEW YORK, NY - JUNE 05: Liv Tyler is seen in Soho on June 5, 2014 in New York City. (Photo by Alo Ceballos/GC Images)
People is reporting that Liv Tyler has given birth to her second son in New York City yesterday.The Leftovers actress was surrounded by close friends and family for the exciting arrival, including her dad Steven Tyler, mom Bebe Buell and her sister Mia Tyler.The brunette beauty's beau, Dave Gardner, was also by her side as they welcomed their first child together.During an interview with Town & Country magazine, Tyler recently revealed how much fun this pregnancy has been for her.
NEW YORK NY - APRIL 14: Liv Tyler sighting on April 14, 2014 in New York City. (Photo by Josiah Kamau/BuzzFoto/FilmMagic)
NEW YORK, NY - OCTOBER 29: Actress Liv Tyler and Milo William Langdon are seen Walking in Soho on October 29, 2013 in New York City. (Photo by Raymond Hall/FilmMagic)
NEW YORK, NY - OCTOBER 16: (Exclusive Coverage) Liv Tyler performs during soundcheck for a performance benefitting David Lynch Foundation at Electric Lady Studio on October 16, 2013 in New York City. (Photo by Kevin Mazur/WireImage)
New Zealand director Peter Jackson, right, stands with members of his cast, Liv Tyler and Christopher Lee, left, during a photo call at Castellaras Castle near Cannes, France, Friday May 11, 2001. They are in Cannes to promote the film trilogy "The Lord of the Rings" which will be released in December. (AP Photo/Laurent Rebours)
NEW YORK, NY - SEPTEMBER 18: Liv Tyler is seen in the West Village on September 18, 2013 in New York City. (Photo by Alo Ceballos/FilmMagic)
CANNES, FRANCE - MAY 17: Liv Tyler attending The 66th Annual Cannes Film Festival on May 17, 2013 in Cannes, France. (Photo by Mark Robert Milan/FilmMagic)
NEW YORK, NY - OCTOBER 23: Milo Langdon and Liv Tyler are seen in the West Village at Streets of Manhattan on October 23, 2012 in New York City. (Photo by Alo Ceballos/FilmMagic)
Liv Tyler arrives at the NY Premiere of "The Normal Heart" on Monday, May 12, 2014, in New York. (Photo by Evan Agostini/Invision/AP)
Actress Liv Tyler arrives at the Metropolitan Museum of Art Costume Institute gala, Monday, May 2, 2011 in New York. (AP Photos/Peter Kramer)
Cast members John Rhys-Davies, foreground left, and Sean Astin duke-it-out with their awards as other "The Lord of the Rings: The Return of the King" cast members, from left, Billy Boyd, Bernard Hill, Liv Tyler, John Noble and Andy Serkis hold the awards they won for outstanding ensemble cast for a motion picture at the 10th annual Screen Actors Guild Awardstor in Los Angeles, Sunday, Feb. 22, 2004. (AP Photo/Mark J. Terrill)
NEW YORK - NOVEMBER 15: Actress Liv Tyler (L) and model Kate Moss (R) attend the fashion industry's battle against HIV/AIDs at the '7th on Sale' gala held at the 69th Regiment Armory on November 15, 2007 in New York City. (Photo by Amy Sussman/Getty Images for eBay)
NEW YORK CITY - SEPTEMBER 15: Actress Gwyneth Paltrow, model Kate Moss and actress Liv Tyler attend the Beck Concert and Party on September 15, 1998 at The Roxy in New York City. (photo by Ron Galella, Ltd./WireImage)
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Tyler and Gardner welcomed a boy, Sailor Gene, back in February. This is the second child for the Leftovers actress, 38, who shares a 10-year-old son, Milo, with her ex-husband, Royston Langdon. Gardner also has an 8-year-old son, Grey, from a previous relationship.

PHOTOS: Liv Tyler Shares the Cutest First Photos of Her New Baby Boy Sailor

The proud mother, who is rather private about her relationships, has shared many adorable snaps of her sons (and future step-son) on Instagram.

As we all wait for the wedding, check out these amazing celebrity engagement rings in the video below.

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