Steve Granitz / WireImage 1 / 7
Steve Granitz / WireImage 1 / 7

Why not? After stepping out for her first official red-carpet appearance with her new beau at a pre-Emmys bash, it was only right for Kaley Cuoco to bring her hew boyfriend, Ryan Sweeting, to the main event!

PHOTOS: Emmys 2013: Best-dressed stars!

The "Big Bang Theory" actress brought the tennis player as her date to the 65th Primetime Emmy Awards, held at the Nokia Theatre in L.A. on Sept. 22. Dressed to stun, the 27-year-old wore a gorgeous Vera Wang corseted ballgown with Aldo heels for the star-studded event. She also accessorized with a Jimmy Choo clutch and Neil Lane jewelry. (Two days prior, the couple attended Entertainment Weekly's party at Fig & Olive Melrose Place in West Hollywood, Calif.)

PHOTOS: Hollywood's biggest flirts

"Massive thank you to @VeraWangGang for letting me wear the most gorgeous dress ever! It was an honor!!!!" the blond beauty tweeted after the show.

The special evening marks the first big award show for the pair, who kept close throughout the night -- especially on the red carpet! At one point, the actress stumbled in her heels before heading in to take her seat and had to be caught by Sweeting, an eyewitness reveals to Us Weekly.

PHOTOS: Emmys best-dressed of all time

Meanwhile, during the quick save, Cuoco's ex-boyfriend Johnny Galecki was making his way onto the red carpet while holding hands with girlfriend Kelli Garner, the insider added. Galecki, 38, and the former "Pan Am" star, 29, also attended the 2012 award show together and first went public with their relationship in March 2012.

PHOTOS: Emmys 2013: What all the stars wore!

Galecki's PDA with Garner is quite different than his past relationship with Cuoco. The "Big Bang" co-stars were previously very secretive of their two-year romance, and it was only later revealed (after their split) when Cuoco admitted it to CBS Watch magazine in September 2010.


See all the fashion hits and misses from the night

Watch Wonderwall interview all the biggest stars on the carpet

See who walked the red carpet at the Emmys