Gisele Bundchen and Gabrielle Union lead stars taking to social media to show ...

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After a week of celebrations, Halloween is finally upon us, which means a flood of costumes hitting social media.

And as the sun sets, some of 's hottest stars are stepping out for the festivities in their best looks.

Gisele Bündchen opted out of anything too revealing, sporting a globe for an Earth costume.

Mother Earth: Gisele Bündchen opted out of anything too revealing this Halloween, sporting a globe for an Earth costume

Mother Earth: Gisele Bündchen opted out of anything too revealing this Halloween, sporting a globe for an Earth costume

She stepped out for trick-or-treating with her family, including husband Tom Brady as a stormtrooper, son Benjamin as a dinosaur and daughter Vivian as a cowgirl.

Gabrielle Union showed off her taut midriff in a boxer costume, paired with some red laced-up stiletto booties, for a 'pole/boxing fusion' teacher look.

Husband Dwayne Wade channeled Wesley Snipes as Nino Brown in the 1991 film New Jack City. 

The couple also donned some cactus costumes with adorable baby Kaavia for her first Halloween.

Trick or treat: She stepped out for trick-or-treating with her family, including husband Tom Brady as a stormtrooper, son Benjamin as a dinosaur and daughter Vivian as a cowgirl

Trick or treat: She stepped out for trick-or-treating with her family, including husband Tom Brady as a stormtrooper, son Benjamin as a dinosaur and daughter Vivian as a cowgirl

Knockout look: Gabrielle Union showed off her taut midriff in a boxer costume, paired with some red laced-up stiletto booties, for a 'pole/boxing fusion' teacher look

Knockout look: Gabrielle Union showed off her taut midriff in a boxer costume, paired with some red laced-up stiletto booties, for a 'pole/boxing fusion' teacher look

Throwback reference: Husband Dwayne Wade channeled Wesley Snipes as Nino Brown in the 1991 film New Jack City

Throwback reference: Husband Dwayne Wade channeled Wesley Snipes as Nino Brown in the 1991 film New Jack City

Baby's first Halloween: The couple also donned some cactus costumes with adorable baby Kaavia for her first Halloween

Baby's first Halloween: The couple also donned some cactus costumes with adorable baby Kaavia for her first Halloween

Viral inspiration: Liam Hemsworth's new love interest Maddison Brown went full-on 'rise and shine' in a Kylie Jenner costume, inspired by the viral video

Channeling Kylie: She donned a black Chanel dress, captioning the look: 'My new lip kit ‘DYNASTY MUSICAL EPISODE’ dropping tomorrow at 9pm on the CW.'

Viral inspiration: Liam Hemsworth's new love interest Maddison Brown went full-on 'rise and shine' in a Kylie Jenner costume, inspired by the viral video. She donned a black Chanel dress, captioning the look: 'My new lip kit ‘DYNASTY MUSICAL EPISODE’ dropping tomorrow at 9pm on the CW'

Are you the Keymaster? January Jones might have won Halloween as Sigourney Weaver's Ghostbusters character Dana

Are you the Keymaster? January Jones might have won Halloween as Sigourney Weaver's Ghostbusters character Dana

Possessed: She channeled the character's sultry look from the 'gatekeeper' scene, in which Dana becomes possessed by a demon

'80s chic: The look was complete with an iridescent orange off-the-shoulder dress and a teased '80s style wig

'80s chic: She channeled the character's sultry look from the 'gatekeeper' scene, in which Dana becomes possessed by a demon. The look was complete with an iridescent orange off-the-shoulder dress and a teased '80s style wig

Flower girl: Kaia Gerber teased a heroin chic look with a mirror of herself rocking a fashion mullet with a crown of pastel flowers

Flower girl: Kaia Gerber teased a heroin chic look with a mirror of herself rocking a mullet with a crown of pastel flowers

You're a wizard, Paris: Paris Jackson channeled 'gay wizard' in a Radagast the Brown costume from Lord of the Rings

You're a wizard, Paris: Paris Jackson channeled 'gay wizard' in a Radagast the Brown costume from Lord of the Rings

Rainbow Princess: Jessica Alba went as a rainbow, complementing her daughter Haven's Rainbow Princess costume

Rainbow Princess: Jessica Alba went as a rainbow, complementing her daughter Haven's Rainbow Princess costume

Nightmare Before Christmas: Dax Shepard and Kristen Bell played a wild card with their Christmas looks as Santa and Mrs. Claus, as their children went a reindeer and Christmas tree

Nightmare Before Christmas: Dax Shepard and Kristen Bell played a wild card with their Christmas looks as Santa and Mrs. Claus, as their children went a reindeer and Christmas tree

Punks and spiders: P!nk and husband Carey Hart dressed as punk rockers, while their kids opted for Spider-Man and Spider-Woman

Punks and spiders: P!nk and husband Carey Hart dressed as punk rockers, while their kids opted for Spider-Man and Spider-Woman

Role reversal: Addams Family star Charlize Theron mixed it up and went as Gomez Addams, as her mom played Morticia

Role reversal: Addams Family star Charlize Theron mixed it up and went as Gomez Addams, as her mom played Morticia

Liam Hemsworth's new love interest Maddison Brown went full-on 'rise and shine' in a Kylie Jenner costume, inspired by the viral video.

She donned a black Chanel dress, captioning the look: 'My new lip kit ‘DYNASTY MUSICAL EPISODE’ dropping tomorrow at 9pm on the CW.'

January Jones might have won Halloween as Sigourney Weaver's Ghostbusters character Dana.

She channeled the character's sultry look from the 'gatekeeper' scene, in which Dana becomes possessed by a demon.

The look was complete with an iridescent orange off-the-shoulder dress and a teased '80s style wig.

Kaia Gerber teased a heroin chic look with a mirror of herself rocking a mullet with a crown of pastel flowers.  

Paris Jackson channeled 'gay wizard' in a Radagast the Brown costume from Lord of the Rings.

Jessica Alba went as a rainbow, complementing her daughter Haven's Rainbow Princess costume.

Dax Shepard and Kristen Bell played a wild card with their Christmas looks as Santa and Mrs. Claus, as their children went a reindeer and Christmas tree. 

P!nk and husband Carey Hart dressed as punk rockers, while their kids opted for Spider-Man and Spider-Woman. 

Addams Family star Charlize Theron mixed it up and went as Gomez Addams, as her mom played Morticia. 

Gigi Hadid went for an obscure comic book nod with a Black Cat (aka Felicia Hardy) costume, complemented by her Spider-Man date. 

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