Rockefeller Center is getting its annual spruce-up.

The massive Rockefeller Center Christmas tree was lifted into place in the Midtown hub Saturday, marking the official start of the holiday season.

Judy Russ and her 7-year-old son, Liam, helped wedge the stability spike into the 75-foot-tall Norway Spruce that just two days earlier had been growing in the backyard of their upstate New York home.

“We are so happy that people are here celebrating, it’s kicking off the Christmas season, spreading love, joy — it’s awesome. It’s a really incredible feeling, it’s good energy here today for sure,” Russ, 37, told The Post.

The celebration was bittersweet for Russ, who donated the magnificent tree for this year’s festivities in honor of her husband, Dan, who died in 2020 at the age of 32.

The tree stood on the family’s East Greenbush property for 75 years and reached such astounding heights that Dan even dreamed about it one day becoming the Rockefeller Center Christmas tree.

“So every generation has its own memories with the tree. What really made me decide is just finally seeing how big it is, how grand it is. We talked about renting a crane to decorate it and that’s when I realized that this is bigger than your usual tree in your backyard,” Russ explained.

Russ encouraged holiday lovers from far and wide to visit her family’s tree and take loads of pictures.

“Whether it’s your first time coming to see it or [your] hundredth time, let’s come together, bring everyone together, spread love, spread Christmas joy.”

Crowds on Saturday were more than happy to oblige.

Dozens swarmed the towering tree in the hours before it took its traditional spot in the well-known promenade, despite some early rain showers.

“It’s surreal! I’ve seen it up at Christmas time, but to see the process is cool,” said Leanne Garza, 36, who planned a vacation to the Big Apple with friend Kaissa Trevino from South Texas just to see the tree.

“It’s going to be part of our memories of being in New York City for sure!”

Trevino, 33, agreed.

“This is my first time. I’m really excited to see it go up. [Since] I was a kid, I’ve always wanted to see it,” Trevino said.

“I knew it would be big, but not this big.”

Pennsylvania mom Jessica Olson, and her college student daughter Bailey watched crews of workers prepare the tree for placement, calling it “exciting.”

“I didn’t think it was real. I never realized it was such a big tree, it’s just incredible,” said Bailey, 18. “I’m excited to see what it looks like when it’s up and all fluffed out. It’s gonna be so gorgeous!”

Her mother was also impressed.

“It’s neat to see the ones involved under the tree. There is a whole crew of people you wouldn’t think would be there to help pick up the tree,” the 48-year-old said.

“It feels like the start of the Christmas season. It puts you in a festive mood.”

Dominique Perrot, a retired school teacher, woke up at 5 a.m. for what she called a “once-in-a-lifetime experience.

Perrot had never witnessed the Rockefeller Christmas tree make its seasonal debut, even though she lives just across the East River in Astoria.

“I like the size, the length, the trip — where it came from, the excitement. I like to see it better this way. It’s charming with the little pine cones. I prefer to see it this way,” said Perrot, 74.

“I decided to come because last year I saw pictures and videos of it slowly coming up the street. It looked so charming, so massive. It’s like a big contrast — there is the New York City traffic and noise and every day craziness and then you have this big tree, representing quietness and calmness,” she said.

The 75-foot Norway spruce made its arrival overnight, two days after it was chopped down from its longtime upstate home.

It will officially light up with 50,000 bulbs at the annual lighting ceremony on Dec. 3.