Pentatonix, Kentucky Derby, Tara, Johnny 2018

Michael Loccisano/Getty Images for Churchill Downs

The Kentucky Derby is underway—and the stars are off to the races!

NBC commentators Tara Lipinski and Johnny Weir are back for the fourth time since 2014, wearing some of their boldest looks yet. Stephen Amell, Anthony Anderson, Ty Burrell, Victoria Justice and Aisha Tyler walked the red carpet, as did a capella supergroup Pentatonix. The late Anna Nicole Smith's mini-me, Dannielynn Birkhead, also made an annual appearance.

The annual event, now in its 144th year, is being broadcast on NBC and the NBC Sports app.

See which stars traveled to Louisville to watch the race:

Dannielynn Birkhead, Larry Birkhead, 2018 Kentucky Derby

Dia Dipasupil/Getty Images for Chruchill Downs

Ty Burrell

Robin Marchant/Getty Images for Churchill Downs

 Stephen Amell, Kentucky Derby

Dia Dipasupil/Getty Images for Ark Endeavors

Aisha Tyler, Kentucky Derby, 2018

Dia Dipasupil/Getty Images for Chruchill Downs

Kaitlyn Bristowe, 2018 Kentucky Derby

Courtesy of Angry Orchard

Taylor Kitsch, Kentucky Derby, 2018

Michael Loccisano/Getty Images for Churchill Downs

Richard Lawson, Tina Lawson, Kentucky Derby, 2018

Michael Loccisano/Getty Images for Churchill Downs

Victoria Justice

Michael Loccisano/Getty Images for Churchill Downs

Johnny Knoxville

Dia Dipasupil/Getty Images for Chruchill Downs

Cassandra Jean, Stephen Amell

Dia Dipasupil/Getty Images for Chruchill Downs

Laila Ali, Kentucky Derby, 2018

Dia Dipasupil/Getty Images for Chruchill Downs

Tara Lipinski, Johnny Weir

Dia Dipasupil/Getty Images for Chruchill Downs

Tom Colicchio

Michael Loccisano/Getty Images for Churchill Downs

Kid Rock, Kentucky Derby, 2018

Dia Dipasupil/Getty Images for Chruchill Downs

Dylan Dreyer, Kentucky Derby, 2018

Michael Loccisano/Getty Images for Churchill Downs

Pentatonix, Kentucky Derby, 2018

Dia Dipasupil/Getty Images for Chruchill Downs

Joey Fatone, Kentucky Derby

Dia Dipasupil/Getty Images for Chruchill Downs

Teddi Mellencamp

Daniel Boczarski/Ram

Anthony Anderson, Kentucky Derby, 2018

Michael Loccisano/Getty Images for Churchill Downs

Travis Tritt, Theres Tritt, Kentucky Derby, 2018

Michael Loccisano/Getty Images for Churchill Downs

Graham Elliot

Dia Dipasupil/Getty Images for Chruchill Downs

Jason Witten, Michelle Witten, Kentucky Derby, 2018

Michael Loccisano/Getty Images for Churchill Downs

(E!, NBC and NBC Sports are all members of the NBCUniversal family.)

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