Mad Men star Jon Hamm and actress and playwright Jessica Westfeldt have been going strong for nearly 15 years, without ever formally tying the knot.

Award-winning actors Matthew Broderick -- who will co-host the Vineyard Theatre Gala on February 28 -- and Sarah Jessica Parker aren't out on the town as often since they become parents of twins last year.

Oscar winner Michael Douglas and Tony Award winner Catherine Zeta-Jones never fail to turn heads whenever they're in public.

Emmy Award winner Neil Patrick Harris -- soon to play Bobby in the New York Philharmonic's production of Company -- keeps company at home with partner David Burtka and their newborn boys.

Golden Globe Award winner and Broadway veteran Claire Danes can often be spotted on the arm of her handsome husband, stage and screen star Hugh Dancy.

Award-winning singer-songwriter Elton John -- currently represented on Broadway by Billy Elliot and The Lion King and on the big screen with Gnomeo & Juliet -- and husband David Furnish recently became parents to a boy named Zachary.

Maggie Gyllenhaal and Peter Sarsgaard are currently co-starring in Classic Stage Company's acclaimed production of Anton Chekhov's Three Sisters.

Film star Naomi Watts and Tony Award winner Liev Schreiber make a perfect pair!

Samuel Jackson, who will reportedly come to Broadway this fall in The Mountaintop, and wife LaTanya Richardson -- last seen on the Great White Way in Joe Turner's Come and Gone -- are a truly dynamic duo.

Will Swenson -- soon to return to Broadway in Priscilla Queen of the Desert the Musical -- and four-time Tony Award winner Audra McDonald are one of the theater world's most popular pairs.

Brooke Adams and her husband, Emmy Award winner Tony Shalhoub, lit up the stage together last season in the hilarious revival of Lend Me a Tenor.

Tony Award winner James Earl Jones, now starring in the Broadway revival of Driving Miss Daisy, is lucky to have wife Cecilia Hart by his side.

Tony Award nominee Kelli O'Hara -- who will perform with Nathan Gunn and the New York Philharmonic next month -- makes beautiful music offstage with husband Greg Naughton.

Tony Award winner Laura Benanti and husband Steven Pasquale -- who will co-star in Tony Kushner's The Intelligent Homosexual's Guide to Capitalism and Socialism With a Key to the Scriptures -- are simply stunning.

Finally, here are two amazing twosomes: Tony Award winner Brian Stokes Mitchell and his talented wife, Alyson Tucker, and the brilliant Marin Mazzie and Jason Danieley.