Well, that’s one way to kick off the New Year.
“2016 is off to a great start already!” the new mom wrote. “4 lbs away from my goal weight!”
Although the actress, 28, didn’t share the exact number of her goal weight, Rivera hit the red carpet in December looking amazing at the March of Dimes Celebrations of Babies — her first red carpet event since she welcomed her son.
Wearing a simple floor-length, white gown, which featured long sleeves and a turtleneck, the actress revealed to PEOPLE that she’d been working on her come back and had started hitting the gym again.
“[I’m] definitely working out now,” she said. “I’m training and still spinning and all of that good stuff.”
The hard work has obviously paid off as the former Glee star’s end goal is in sight.
Despite her quick bounce back, the baby weight was well worth it. Rivera told PEOPLE about her new role as mom, describing her son as “such a ham.”
“It’s absolutely amazing,” she said. “It’s just something clicks, and you do it really, really well and you’re instantly in love with this little person that you just met, but it’s awesome.”
— Naja Rayne