Ryan Reynolds is dead(pool) serious about these trick-or-treating rules.
The Proposal star issued a warning—a red notice, if you will—to his and Blake Lively's four kids that he won't stand for their Halloween costumes going against SAG-AFTRA's guidelines on what outfits actors should wear amid the ongoing Hollywood strike.
Variety reported that the union released instructions for its members to "celebrate Halloween this year while also staying in solidarity" with the protests, suggesting they "dress up as characters from non-struck content, like an animated TV show" instead of recent blockbuster films like Barbie.
In response to the outlet, Ryan, 46, joked that he'll be honoring their proposal by calling out his 8-year-old daughter James for crossing picket lines.
"I look forward to screaming 'scab' at my 8 year old all night," Ryan tweeted. "She's not in the union but she needs to learn."
In addition to keeping their eldest in line, the couple—who also share Inez, 6, Betty, 4, and a baby whose name and sex have not been revealed—are supporting the strike by funding actors out of work.
In August, Blake and Ryan donated $1 million to the SAG-AFTRA Foundation, which provides emergency financial assistance to performers on strike. (Other couples to each give the eye-popping sum were George and Amal Clooney; Luciana and Matt Damon; Hugh Jackman and Deborra-lee Furness; and Jennifer Lopez and Ben Affleck.)
Although Blake and Ryan are backing up other actors in their industry, they aren't too thrilled with the idea of their kids following in their footsteps into acting.
As Ryan quipped on Today in 2015, "I worry that my daughter's going to want to go into show business!"
"You worry about really stupid stuff," he added. "And you sorta sit there and go, 'Oh gosh, is she gonna wanna do this?' I like to whisper in her ear, like, really normal everyday jobs... 'You're going to be a flight attendant...a barista...Just normal, wonderful jobs that you can have a nice, normal life.'"
As the actor prepares to help James, Inez and Betty pick out their normal Halloween costumes, see more stars celebrating spooky season this year:
Heidi Klum
There was no fowl play at Heidi Klum's annual Halloween blowout, where she transformed into a peacock with a group of nine acrobats.
Heidi Klum & Tom Kaulitz
Her husband, Tom Kaulitz, was right by her side in his egg-celent outfit.
Leni Klum
Heidi's model daughter was dressed to impress in a pink wig and matching lingerie reminiscent of the Strawberry Shortcake character.
Zayn Malik
The One Direction star was unrecognizable as Voldemort from Harry Potter.
Rachel Zegler & Josh Rivera
Hopefully the Snow White actress brought Scooby Snacks! The pair were ready to solve a mystery as Daphne and Fred.
Taylor Lautner & Taylor Dome
The Twilight star and podcaster transformed into Saturday Night Live sketch characters from "YEET SKRT," starring Pete Davidson and Timothee Chalamet.
Alix Earle
The influencer was Jadis the White Witch from Narnia at Heidi Klum's party.
Tayshia Adams
The Bachelorette star got the party started at Heidi Klum's festivities.
Megan Thee Stallion
The "WAP" star made herself at home at the Mad Hatter's tea party.
Victoria Monét
The Queen of Hearts arrived to Megan Thee Stallion's Alice in Wonderland celebration.
Kourtney Kardashian
The Poosh founder recreates her sister Kim Kardashian's iconic Met Gala 2013 maternity style.
Ice Spice
The rising star was Betty Boop during her iHeart Powerhouse 105.1 performance at Prudential Center on Oct. 28 in New Jersey.
Alix Earle
The TikTok star was in vogue for Halloween, dressing as Madonna in her famous Jean Paul Gaultier cone bra.
G Flip & Chrishell Stause
The couple closed the deal on dressing as Troye Sivan and Ross Lynch from the "One of Your Girls" music video. Chrishell joked of the final product, "We haven’t stopped laughing since."
Kendall Jenner
The model was one half of "Sugar & Spice" with her little sister Kylie.
Kylie Jenner
Kylie went Scary Spice for her part of her "Sugar & Spice" costume with Kendall.
Dylan Mulvaney
The TikToker took a bite out of the holiday as Snow White.
Colman Domingo
The Euphoria actor was prepared to yell, "Ready, set, action!"
James Charles
The influencer was not clowning around this Halloween.
Rumer Willis
Bruce Willis and Demi Moore's daughter gave a clever shoutout to Tilda Swinton.
Darren Criss
The Glee star went disco!
Kristen Stewart & Dylan Meyer
The Twilight alum (right) and her fiancée partied with friends while embracing tropical vibes.
Kate Beckinsale
The actress captioned her look, "Barbarella/Pennywise space clowning."
Paris Hilton
The DJ went as Katy Perry—"one of my iconic Queens," as she put it—dressed as a mushroom.
Jenni "JWoww" Farley & Zack Clayton
The Jersey Shore star and her wrestler fiancé proved that life in plastic is fantastic as Barbie and Ken.
Nina Dobrev & Shaun White
The couple rocked out as Axl Rose and Slash of Guns N' Roses.
Ashley Benson
The actress gave vampire vibes in her black ensemble this year.
Camila Mendes & Rudy Mancuso
Camila embraced her lover while dressed as Julie Newmar’s Catwoman.
Trisha Paytas & Moses Hacmon
The influencer's love story naturally included a nod to Taylor Swift and Travis Kelce attending a Chiefs football game.
Rosalía
The "La Fama” singer recreated Björk’s infamous swan dress for her Halloween look.
(E!, Universal Studios and Today are both part of the NBCUniversal family.)