Telling sign Jake Gyllenhaal and girlfriend Jeanne Cadieu are getting serious (report)

Things are heating up between Jake Gyllenhaal and his girlfriend, Jeanne Cadieu.

The "Nightcrawler" actor was first casually linked to the French model back in December, but recent sightings and new details point to the couple becoming more serious.

Page Six reports that Gyllenhaal, 38, has introduced Cadieu, 23, to his family recently, and the couple recently went on a romantic getaway to Martha's Vineyard off the coast of Cape Cod.

SEE ALSO: Maggie Gyllenhaal opens up about 'valuable' relationship with brother Jake

Cadieu has also been spotted at a slew of previews for "Sea Wall/A Life," the limited run Broadway play that Gyllenhaal stars in alongside British actor Tom Sturridge. The pair also both appear in the "Inside Out" photo exhibition, which features portraits of a large group of famous faces, including Gyllenhaal and Cadieu, on the walls outside of the Hudson Theatre, which is home to "Sea Wall/A Life."

See photos of Jeanne Cadieu:

Jeanne Cadieu out and about
See Gallery
Jeanne Cadieu out and about
HUDSON THEATER, NEW YORK CITY, NY, UNITED STATES - 2019/08/08: Jeanne Cadieu attends the "Sea Wall / A Life" Broadway Opening Night at the Hudson Theater in New York. (Photo by Efren Landaos/SOPA Images/LightRocket via Getty Images)
NEW YORK, NY - AUGUST 08: Jeanne Cadieu attends the Broadway Opening Night performance of "Sea Wall / A Life" at the Hudson Theatre on August 08, 2019 in New York City. (Photo by Walter McBride/WireImage,)
NEW YORK, NEW YORK - AUGUST 08: Jeanne Cadieu attends FIJI Water At Sea Wall / A Life Opening Night On Broadway on August 08, 2019 in New York City. (Photo by Cindy Ord/Getty Images for FIJI Water)
HOLLYWOOD, CA - JUNE 26: Jeanne Cadieu attends the premiere of Sony Pictures' "Spider-Man Far From Home" at TCL Chinese Theatre on June 26, 2019 in Hollywood, California. (Photo by Gregg DeGuire/WireImage)
HOLLYWOOD, CALIFORNIA - JUNE 26: Jeanne Cadieu attends the Premiere Of Sony Pictures' "Spider-Man Far From Home" at TCL Chinese Theatre on June 26, 2019 in Hollywood, California. (Photo by Frazer Harrison/Getty Images)
French model Jeanne Cadieu arrives for the Spider-Man: Far From Home World premiere at the TCL Chinese theatre in Hollywood on June 26, 2019. (Photo by Chris Delmas / AFP) (Photo credit should read CHRIS DELMAS/AFP/Getty Images)
Latvian model Anastasija Titko and French model Jeanne Cadieu of The Society Management exit the BCBG show at Skylight at Moynihan Station on September 10, 2015 in New York City. Anastasia displays a "peace" hand sign and Jeanne wears a graphic maroon sweater.

The rumored couple has been spotted numerous times over the past several months, including a January dinner date at a New York City Sweetgreen where onlookers said that Gyllenhaal looked "super smiley" and "so happy."  She also attended the June premiere of her boyfriend's latest movie, "Spider-Man: Far From Home," though they didn't walk the red carpet together.

Ahead of the limited Broadway run for "Sea Wall/A Life," Gyllenhaal opened up to AOL about his love for theater and the different way in which it allows him to connect with audiences.

"I’ve learned how much love there is when people decide to come to the theater and that the love of the theater is a very particular kind of thing. It's the love for that live experience," Gyllenhaal told us back in June. "It’s a commitment, and I consider it to be an honor every night when I get out there to perform for a large group of people who have gathered and paid for that specific thing. It’s something you don’t get when you do television or film. You never really feel that feeling, and I think that anticipation moved us into realizing how much we appreciate and love the audience that comes together."

SEE ALSO: Jake Gyllenhaal: 'I hope to be a father one day'

While he's certainly receiving support for his latest acting project from his girlfriend, Gyllenhaal has also been getting input from his sister, fellow actor Maggie Gyllenhaal. During a separate interview with AOL, Maggie explained that their brother-sister relationship is extra "valuable" because they can give each other genuine feedback on their various artistic works.

"I know how much my reaction to his work affects him, and that’s such a beautiful thing to go in curious and loving and warm to watching someone you love do their work," she explained. "I feel that way about just a few people, and he’s one of them."

See photos of Jake Gyllenhaal from earlier in his career:

Jake Gyllenhaal in his early career years
See Gallery
Jake Gyllenhaal in his early career years
NEW YORK CITY - NOVEMBER 8: Actor Jake Gyllenhaal attends the "Anywhere But Here" New York City Premiere on November 8, 1999 at the Union Square Theatre in New York City. (Photo by Ron Galella/Ron Galella Collection via Getty Images)
Jake Gyllenhaal during "A Midsummer Night Dream" Screening at Chelsea West Cinemas in New York City, New York, United States. (Photo by Ron Galella/Ron Galella Collection via Getty Images)
UNITED STATES - 17th January 2000: Actors Selma Blair and Jake Gyllenhaal arrive at the New York premiere of the new Miramax romantic comedy 'Down To You'. (Photo by The LIFE Picture Collection via Getty Images/Getty Images)
Jake Gyllenhaal (Photo by SGranitz/WireImage)
Jake Gyllenhaal at the premiere of "Harry Potter and the Sorcerer's Stone." (Photo by Frank Trapper/Corbis via Getty Images)
WESTWOOD, CA - NOVEMBER 14: Actor Jake Gyllenhaal attends the "Harry Potter and the Sorcerer's Stone" Westwood Premiere on November 14, 2001 at the Mann Village Theatre in Westwood, California. (Photo by Ron Galella, Ltd./Ron Galella Collection via Getty Images)
Maggie Gyllenhaal and Jake Gyllenhaal (Photo by Amy Graves/WireImage)
LONDON - NOVEMBER 7: Kirsten Dunst and Jake Gyllenhaal kiss at the UK Premiere Party for "Sylvia" at Mezzo in Soho on November 7, 2003 in London. (Photo by Dave Benett/Getty Images)
UNITED KINGDOM - NOVEMBER 05: Jake Gyllenhaal, British Independent Film Awards 2003 At Po Na Na In Hammersmith, London, Where Established Stars As Well As Beginners Were Honoured By The Independent Film Industry (Photo by Dave Benett/Getty Images)
Jake Gyllenhaal (Photo by Jean-Paul Aussenard/WireImage)
Jake Gyllenhaal during "Jarhead" Madrid Photocall at Santo Mauro Hotel in Madrid, Spain. (Photo by Lalo Yasky/WireImage)
NEW YORK CITY, NY - OCTOBER 16: Robert Downey Jr. and Jake Gyllenhaal attend Americans For The Arts National Arts Awards To Honor Those Who Keep The Arts Alive In America at Cipriani on October 16, 2006 in New York City. (Photo by Matt Carasella/Patrick McMullan via Getty Images)

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