The 28-year-old reality star, who is pregnant and expecting her first child with Rob Kardashian, cheered on the 32-year-old Amber Rose Show host during the Dancing with the Stars Season 23 premiere.
Blac Chyna watched as Rose and professional dancer Maksim Chmerkovskiy scored a 24 with their foxtrot to "Here" by Alessia Cara. Rose told E! News after the episode that it felt "amazing" to have her friend in the audience.
"Blac Chyna's like my sister. I felt bad because she had her [Rob & Chyna] premiere last night and I couldn't make it because I was with [Maksim], but she understands," she said. "I was there in spirit and she still came here to support me tonight."
"My mom is here, my cousins, my aunties. Everybody came through, so I felt very special," the television personality added.
Rose also gave an update on Blac Chyna's pregnancy while speaking to Entertainment Tonight. She and the reality star are longtime pals who attended the MTV Video Music Awards and the BET Awards together in 2015.
"My dearest friend Blac Chyna came out to support me tonight," Rose said. "She feels amazing. She doesn't feel her pregnancy at all, which is so weird. She has no cravings, no morning sickness. It's just like her stomach is getting bigger and it's a regular day for her."
Blac Chyna and Kardashian shared a sonogram of their unborn baby the same day as the Dancing premiere. The couple had revealed they're expecting a girl on the Rob & Chyna premiere Sunday.