Ashley Olsen and boyfriend Richard Sachs vacation together in St. Barts

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Ashley Olsen and Richard Sachs have taken their relationship to the next level.

The new couple celebrated their first holiday together over the weekend while on vacation in St. Barts.

WATCH: Mary-Kate and Ashley Olsen Show Off Bikini Bodies, Go Makeup-Free in France

Olsen, 30, sported a Bob Dylan tee and Nike sweatpants while out and about with her 58-year-old boyfriend, who showed off his tan in a pair of black gym shorts.

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According to an eyewitness, Olsen and Sachs spent a week at the art dealer's island villa, keeping a low-profile throughout their trip. The two went for daily romantic walks on hills near the villa, where they were seen talking, listening to music and flirting.

Olsen and Sachs were first spotted together earlier this month, showing major PDA during a New York Nicks vs. Brooklyn Nets game at Madison Square Garden in New York City.

See more photos of Mary-Kate and Ashley Olsen through the years:

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Mary-Kate and Ashley Olsen
NEW YORK, NY - NOVEMBER 06: Mary-Kate Olsen and Ashley Olsen attend 2014 World Of Children Awards at 583 Park Avenue on November 6, 2014 in New York City. (Photo by Robin Marchant/Getty Images)
NEW YORK, NY - JUNE 02: Designers Mary-Kate Olsen (L) and Ashley Olsen speak onstage at the 2014 CFDA fashion awards at Alice Tully Hall, Lincoln Center on June 2, 2014 in New York City. (Photo by D Dipasupil/Getty Images)
NEW YORK, NY - NOVEMBER 06: Ashley Olsen, Jim Gold and Mary-Kate Olsen attend 2014 World Of Children Awards at 583 Park Avenue on November 6, 2014 in New York City. (Photo by Robin Marchant/Getty Images)
NEW YORK, NY - NOVEMBER 06: Mary-Kate Olsen and Ashley Olsen attend 2014 World Of Children Awards at 583 Park Avenue on November 6, 2014 in New York City. (Photo by Robin Marchant/Getty Images)
NEW YORK, NY - JUNE 02: Designers Ashley Olsen (L) and Mary-Kate Olsen attend the 2014 CFDA fashion awards at Alice Tully Hall, Lincoln Center on June 2, 2014 in New York City. (Photo by Gilbert Carrasquillo/FilmMagic)
NEW YORK, NY - MAY 05: Mary-Kate Olsen and Ashley Olsen attend the 'Charles James: Beyond Fashion' Costume Institute Gala at the Metropolitan Museum of Art on May 5, 2014 in New York City. (Photo by Kevin Mazur/WireImage)
NEW YORK, NY - MARCH 12: Ashley Olsen and Mary-Kate Olsen attend the Elizabeth and James SEPHORA VIB ROUGE Event on March 12, 2014 in New York City. (Photo by Kevin Mazur/Getty Images)
NEW YORK, NY - SEPTEMBER 05: Mary-Kate Olsen and Ashley Olsen attend the Lexus Design Disrupted Event at SIR Stage 37 on September 5, 2013 in New York City. (Photo by Andrew Toth/FilmMagic)
SAG HARBOR, NY - AUGUST 16: Actress Ashley Olsen attends the 3rd Annual 'The Hamptons Paddle & Party for Pink' Benefit on August 16, 2014 in Sag Harbor, New York. (Photo by Mark Sagliocco/WireImage)
NEW YORK, NY - MAY 16: Ashley Olsen and Mary-Kate Olsen attend the Indiana Pacers Vs New York Knicks Game at Madison Square Garden on May 16, 2013 in New York City. (Photo by James Devaney/WireImage)
NEW YORK, NY - FEBRUARY 15: Ashley Olsen (L) and Mary-Kate Olsen attend the J. Mendel Fall 2012 fashion show during Mercedes-Benz Fashion Week at The Theatre at Lincoln Center on February 15, 2012 in New York City. (Photo by D Dipasupil/FilmMagic)
NEW YORK, NY - MAY 31: Mary-Kate Olsen and Ashley Olsen attend The Fresh Air Funds Salute To American Heroes at Pier Sixty at Chelsea Piers on May 31, 2012 in New York City. (Photo by Jason Kempin/Getty Images)
NEW YORK, NY - NOVEMBER 01: Ashley Olsen and Mary-Kate Olsen attend the Christian Louboutin Cocktail party at Barneys New York on November 1, 2011 in New York City. (Photo by Cindy Ord/Getty Images)
NEW YORK, NY - NOVEMBER 06: Mary- Kate Olsen (L) and Ashley Olsen attend the 2014 World Of Children Awards at 583 Park Avenue on November 6, 2014 in New York City. (Photo by Andrew Toth/FilmMagic)
Actress/designers Mary-Kate Olsen and Ashley Olsen attend The Cinema Society & Thierry Mugler screening of 'Midnight in Paris' at the Tribeca Grand Screening Room on May 17, 2011 in New York City. (Photo by Charles Eshelman/FilmMagic)
LONDON, ENGLAND - FEBRUARY 22: (UK TABLOID NEWSPAPERS OUT) Mary-Kate Olsen and Ashley Olsen arrive at the Elle Style Awards 2010 held at The Grand Connaught Rooms on February 22, 2010 in London, England. (Photo by Gareth Davies/Getty Images)
UNITED STATES - NOVEMBER 17: It was easy to tell the Olsen twins apart at a MoMA benefit: Mary-Kate went for demure, while Ashley rocked a leopard print! (Photo by Richard Corkery/NY Daily News Archive via Getty Images)
LONDON - OCTOBER 07: (EMBARGOED FOR PUBLICATION IN UK TABLOID NEWSPAPERS UNTIL 48 HOURS AFTER CREATE DATE AND TIME) Mary-Kate and Ashley Olsen attend a private party to celebrate the launch of Mary-Kate And Ashley Olsen's in line range 'Elizabeth and James' at Selfridges, on October 7, 2008 in London, England. (Photo by Dave M. Benett/Getty Images)
Mary-Kate Olsen and Ashley Olsen during Mercedes-Benz Fashion Week Fall 2007 - Jenni Kayne - Front Row and Backstage at The Salon, Bryant Park in New York City, New York, United States. (Photo by Jamie McCarthy/WireImage for Jenni Kayne)
NEW YORK, NY - JUNE 02: Accessories designer of the year award recipients Mary-Kate Olsen and Ashley Olsen of The Row attend the winners walk during the 2014 CFDA fashion awards at Alice Tully Hall, Lincoln Center on June 2, 2014 in New York City. (Photo by Andrew H. Walker/WireImage)
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The two definitely appear to be moving fast, as Sachs has already met Olsen's twin sister, Mary-Kate. The couple attended the basketball game with Mary-Kate and her husband, 47-year-old Olivier Sarkozy.

WATCH: Mary-Kate and Ashley Olsen Turn 30! Look Back at Their Rise From Child Stars to Billionaire Fashion Designers

See more in the video below.


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