The stunning hopeful stole the show with a tremendous tango set to Demi Lovato's hit song, "Confident."
In the pre-taped package played before the pair took the stage, Sweetin and Motsepe adorably began their segment with a retro, Full House-style introduction.
The pitch-perfect parody quickly transitioned into a behind-the-scenes look at the pair's first meeting and their subsequent rehearsals, where the sitcom star got a little emotional about this new challenge.
"As a kid, I didn't care if I looked stupid, and now as an adult, I have this fear," Sweetin said, tearing up. "I'm reinventing myself now as a 34-year-old woman, and I want people to see who I am today."
When they took to the dance floor, Sweetin made sure people would see who she was and what she had to offer. She and Motsepe delivered a dominant tango dressed in shimmering, midnight purple, with the actress giving it her all.
"It has spirit, it had attack, it had attitude," Len gushed in his feedback, before adding a few technical notes.
In the end, all three judges were appreciative of Sweetin's first effort. Carrie Ann Inaba awarded a seven, Goodman gave a six, and Bruno Tonioli awarded a seven for a grand total of 20 out of 30 -- not a bad score for a first-week performance.
Speaking with DWTS co-host Erin Andrews after the performance, Sweetin said, "We went out there and we had fun. And that was what Keo was telling me to do this whole time, and everyone's been telling me to do, is just go out and have fun and enjoy it, and I enjoyed every moment of that so much."
It's clear from this first outing that the dynamic duo of Sweetin and Motsepe have what it takes to go far this season.