Katryna Remy waited patiently in line Thursday afternoon at the new Costco store in Loomis, her cart filled with a blanket, snacks, water and two 750-milliliter bottles of Four Walls Irish Whiskey.

“I haven’t tried the whiskey yet,” said Remy, of Citrus Heights. “I’m sure it’s good.”

She was the first in line, waiting for more than two hours to meet Charlie Day, one of the stars of the long-running FX sitcom “It’s Always Sunny in Philadelphia.” He’s also one of the celebrities behind the Four Walls whiskey brand.

“It’s just a comfort show for me. I just rewatch it all the time,” Remy said of the outlandish TV series that is still running after 16 seasons.

She brought some headphones along while she waited in line, but she never used them. Instead, she passed the time meeting other fans of the show as they waited to have their bottles of whiskey signed by the Hollywood star.

“We’ve made a lot of friends; just a really good memory,” Remy said. “I’ve been doing a lot of people-watching.”

She was talking about the crowded store filled with shoppers Thursday as Costco celebrated its grand opening at the Loomis location. Costco openings around the region have become a community celebration for residents as well as elected officials.

A few dozen fans greeted Day with applause and cheers as he approached the table with posters of the whiskey brand and its creators.

Rob McElhenney, Glenn Howerton, and Day, the stars and co-creators of “It’s Always Sunny in Philadelphia,” which takes place in a bar, initially introduced a special, collector’s edition bottle of Four Walls whiskey to aid the bartending community during the COVID-19 pandemic. The creators of the whiskey brand have recently launched a general drinking version of Four Walls.

“We wished to establish a brand that commemorates the four walls which have stored our most cherished memories in and kept our problems away — the bar,” stated Howerton about their whiskey on the brand’s website.

Day, who is also renowned for film roles in “Horrible Bosses,” “Pacific Rim,” and “The Super Mario Bros. Movie,” heartily welcomed fans queuing for his whiskey and took pictures with them.

Noah Benjamins from Rocklin purchased five bottles of the basic-drinking version, yet he also carried his collector’s edition bottle of the whiskey for Day to autograph. He had been in line since roughly 11 a.m. for the 2 p.m. bottle-signing event with Day.

“He’s awesome. He’s great,” Benjamins said with a huge grin while displaying his signed collector’s edition bottle. “When I got here, I was shocked that I would be the 10th or 12th person in line. A lot of people were coming up asking, ‘What are you waiting in line for?’”

The newest Costco store in the Sacramento region, opened its gates at about 7:30 a.m. on Thursday. The 155,000-square-foot store is located at 4101 Sierra College Blvd. The turnout was less than expected, but Day’s appearance caused a minor ruckus with shoppers crowding around his table for photos.

Among the excited Costco shoppers was Miracle Rodriguez of Citrus Heights. She was one of the passionate customers who lined up outside the store overnight, sleeping in sleeping bags to be among the early birds. Rodriguez returned to the store after finishing her shopping just to meet Day.

She discovered “It’s Always Sunny in Philadelphia” in its eighth season and became a dedicated fan. Rodriguez admires Day’s character on the show, Charlie Kelly, a lowbrow, somewhat naive, high-energy grinder amongst a group of fools operating a lowbrow bar in Philadelphia. The series, which is available to stream on Hulu, also features Kaitlin Olson and Danny DeVito.

“He’s my favorite. His character is like a little kid,” Rodriguez said of Day’s character. “It’s been the time of my life. Memories forever.”