Hollywood's TV stars brought out their fashion best for the 66th annual Primetime Emmy Awards in Los Angeles on Monday night. Here's a roundup of the top 10 best- and worst-dressed stars:

BEST

Hayden Panettiere

Hayden Panettiere Actress Hayden Panettiere arrives at the 66th Primetime Emmy Awards. Photo: Reuters

Hayden Panettiere was glowing on the red carpet and it wasn’t just her sparkly, floor-length Lorena Sarbu gown. The “Nashville” actress’ dress perfectly fitted her burgeoning baby bump.

Lizzy Caplan

Lizzy Caplan Lizzy Caplan arrives at the 66th Primetime Emmy Awards. Photo: Reuters

Forget "Masters of Sex." Lizzy Caplan was the master of the red carpet in her stunning black and white, floor-length and backless Donna Kara Atelier gown.

Teyonah Parris

Teyonah Parris Teyonah Parris arrives at the 66th Primetime Emmy Awards. Photo: Reuters

Teyonah Parris may have been snubbed for her "Mad Men" performance, but her pop of neon colors made her an instant red carpet winner.

Julia Roberts

Julia Roberts Julia Roberts arrives at the 66th Primetime Emmy Awards. Photo: Reuters

Julia Roberts didn’t win an Emmy for "The Normal Heart," but her navy blue red carpet number is still a winner in our book for its short, fun and flirty style.

Nikolaj Coster-Waldau

Nikolaj Coster-Waldau Actor Nikolaj Coster-Waldau arrives at the 66th Primetime Emmy Awards. Photo: Reuters

Nikolaj Coster-Waldau may not be a household name, but the "Game of Thrones" star's perfectly fitted, two-piece suit (complete with bow tie!) proves he's on his way to the A-list -- at least as far as the red carpet is concerned.

Heidi Klum

Heidi Klum Model and TV host Heidi Klum arrives at the 66th Primetime Emmy Awards. Photo: Reuters

In true supermodel fashion, model and “Fashion Runway” host Heidi Klum looked ravishing in her coral ensemble.

BONUS: Best-dressed kid - Rico Rodriguez

Rico Rodriguez Rico Rodriguez arrives at the 66th Primetime Emmy Awards. Photo: Reuters

At the tender age of 16, “Modern Family” actor Rico Rodriguez was the picture of fashion perfection, ascot and all.

BONUS: Best-dressed couple - Jesse Tyler Ferguson and Justin Mikita

Jesse Tyler Ferguson Jesse Tyler Ferguson (R) arrives with husband, Justin Mikita, at the 66th Primetime Emmy Awards. Photo: Reuters

“Modern Family” actor Jesse Tyler Ferguson (on the right) and his husband, Justin Mikita, caught our attention with a twist on the classic three-piece suit. Good call, gentlemen!

WORST

Sarah Paulson

Sarah Paulson Sarah Paulson arrives at the 66th Primetime Emmy Awards. Photo: Reuters

The overload of tulle on Sarah Paulson’s Armani Privé  dress makes the actress’ gown worthy of its own season of “American Horror Story."

Lena Dunham

Was Lena Dunham trying to troll us with this flamenco-inspired number? Note to the “Girls” stylist: less is more.

Amanda Peet

Amanda Peet Amanda Peet arrives at the 66th Primetime Emmy Awards. Photo: Reuters

Sorry, Amanda Peet, but your flowered, floor-length gown looked more like a nighty than a red carpet-worthy gown.

Laura Fraser

Laura Fraser Laura Fraser arrives at the 66th Primetime Emmy Awards. Photo: Reuters

“Breaking Bad” star Laura Fraser’s short black dress looked more fitting for a casual business lunch than a red carpet. I guess she didn’t get the memo the event was black tie. 

BONUS: Most inappropriate - “Property Brothers”

Property Brothers Drew Scott (L), J.D. Scott and Jonathan Scott of the reality series "Property Brothers" as they arrive at the 66th Primetime Emmy Awards. Photo: Reuters

Two out of three of HGTVs “Property Brother” stars looked decent on the Emmy red carpet, one, not so much. Wearing a kilt and flashing your underwear is no way to woo the academy, Jonathan Scott!