Melissa McCarthy left viewers in awe over her dramatic weight loss transformation as she took on hosting duties for the latest episode of Saturday Night Live. 

The 55-year-old actress - who has been showing off her thinner frame after dropping around 95lbs - wowed in a black velvet jumpsuit that clung to her figure as she stepped onto the SNL stage for the sixth time as host. 

The Bridesmaids star has sparked up Ozempic speculation, but has yet to confirm or deny using the medication to aid in her weight loss journey. 

As she kicked off her opening monologue, fans flocked over to X to share their thoughts on her incredible transformation. 

One penned, 'I'm really impressed by Melissa's weight loss progress,' while another typed, 'So Glad to see Melissa McCarthy Back on the SNL Stage, and She Looks Fabulous!' 

'Melissa mccarthy looks so good on snl rn,' a viewer wrote and one added, 'Melissa McCarthy looks GOOD!!!! And remains the modern queen of physical comedy, we love to see it.' 

An X user shared, 'melissa mccarthy is literally snatched for this monologue,' and one said, 'She looks GREAT!' 

'MELISSA MCCARTHY LOOKS SOOOOO GOOD JESUS CHRIST,' another commented and one fan penned, 'Melissa looks great. Good for her.'

One also added, 'I can't believe how much weight she lost,' and another viewer typed, 'She's lost some good weight, too! Good on ya, Melissa!' 

'Melissa McCarthy is gorgeous,' a fan gushed while one wrote, 'What we are not going to do is body shame Melissa McCarthy right now. She looks great. Leave her alone.' 

The Gilmore Girls alum began her hosting duties in the latest episode as she strutted onto the SNL stage and was greeted by loud cheers from the live audience. 

She wore a velvet jumpsuit with sparkling details around the shoulders as well as a belt with a silver floral embellishment on the front. 

'It is so great to be here hosting Saturday Night Live for the sixth time. Crazy,' McCarthy began, before talking about the holiday season. 

She then shared, 'There is something most people don't know about me. And it's that I am a musician. And my instrument is the mouth horn. That's right. It's the mouth horn.' 

Despite being 'nervous,' the star decided to give a mini performance to get everyone into the Christmas spirit. 

McCarthy was then handed a microphone and she began to loudly hum to the tune of Carol of the Bells. 

After briefly showing off her skills, she continued, 'I love this time of year. The tree is lit, and Santa's checking his lists. He's got naughty and nice, and Epstein. We could all use a little Christmas magic.' 

Fake snow then began to fall around the actress on the stage and she called out for the crew to 'not be stingy' with the fake snow. 

A giant pile then fell on top of her, causing some audience members to let out screams of surprise. 

McCarthy brushed some of the fake snow off of herself and let out a few coughs before expressing her desire to dive into a 'mouth horn and piano duet.'  

An elf - played by Marcello Hernandez - pushed a piano onto the stage. The star stood in front of the large instrument as she talked, but Hernandez kept moving the piano. 

'Okay, you can stop now,' she told him, trying to push it back in his direction and explained that he was past his mark.  

But as he pulled the piano back in his direction, McCarthy was still holding onto the keys - causing her to fall forward on the bench.

The actress became sad because she felt like she 'ruined' Christmas and Kenan Thompson stepped onto the stage to cheer her up. 

'Come on, you haven't ruined Christmas at all. Everyone here loves you. Now, why don't we do one of your favorite Christmas songs?' he asked her. 

She then did a 'mouth horn' rendition of Christmas (Baby Please Come Home) as Thompson and other cast members joined in for the upbeat song to conclude the opening monologue. 

McCarthy has been open about her weight fluctuating up and down over the years. 

And when it comes to her recent weight loss, it is estimated that the star has lost anywhere from 75lbs to 95lbs. 

'I'll be up, I'll be down, probably for the rest of my life,' she told Refinery29 back in 2019. 

'The thing is, if that is the most interesting thing about me, I need to go have a lavender farm in Minnesota and give this up. There has to be something more.'

McCarthy previously talked about not rushing when it comes to losing weight during an appearance on Breakfast Club Power 105.1 FM in 2018, per Today. 

'What's the hurry? I think everybody's always kind of working on something. And I was like, "If I can de-stress and just do it slower and stop constantly trying to be on something."'

She added, 'And then it actually worked better instead of being like, "I'm gonna not do this and do this and only drink this."' 

The Ghostbusters actress also expressed at the time, 'After I had kids, I was just like, "I have to be realistic. It's not gonna go fast." But I mean, I feel great.'

While filming the 2015 movie Spy, McCarthy talked about keeping up with workouts to train for her role in the action comedy, such as strength training.