2015: Debutedit

DIA released their debut album,Do It Amazingon September 14, 2015 with the lead single "Somehow" (왠지;Waenji). Their first official public appearance was on the same day where the group performed a showcase at the Ilchi Art Hall in Seoul. They made their official debut stage on Mnet 'sM! Countdownon September 17, 2015.

2016:Produce 101and acting debutedit

was released, MBK Entertainment confirmed that Jung will return to DIA for their upcoming comeback in June 2016.YMC Entertainment revealed that she would be absent from I.O.I's sub-unit promotions as well.Her casting in tvN 'sDrinking Solowas confirmed on June 30, 2016, marking her acting debut.

with fellow DIA member Eun-jin aired on September 21, 2016, and the premiere of the variety seriesGo Go with Mr. Paikaired on September 23, 2016, with her starring alongside Shinee 's Onew .Combined with idol groups' tendency to perform on each of South Korea's daily music programs , a writer forDaily Sportsnoted that a viewer could see Jung's face virtually every day.She was revealed as the new face of jewelry brand Lamucha that same week, signing a one-year 200 million won contract.

on October 17, 2016 with the lead single " Very Very Very ". The October 21, 2016 broadcast ofMusic Bankmarked an incident where due to scheduling conflicts, she performed on the show twice; once with DIA on their final run of televised performances for "Mr. Potter", and again with I.O.I. as they began promotions for "Very Very Very".

She began modelling for Jill Stuart New York in January 2017.

2017–present: Acting activitiesedit

, playing an android robot.In December, it was announced that Jung has joined the cast of SBS' reality survival showLaw of the Junglefor their Chile special.

Inkigayo.Jung was cast in the KBS music dramaTo Jenny, her first leading role on television.

Film

Television series

Variety show

1. "[S영상] 유주 은하 도겸 등 '고등학교 졸업 현장' (서울공연예술고등학교 졸업식)". Star Daily (in Korean). 4 February 2016. 
2. "Final lineup revealed for MBK's newest girl group". Kpop Herald. 16 June 2015. 
3. Kim, JiYeon (15 June 2016). "DIA′s Hee Hyeon Opens Up About ′Produce 101′ Elimination". enewsWorld. Retrieved 22 January 2017. 
4. Jeong, Yoo-jin. "다이아 측 "채연•캐시 잠정 탈퇴..'프로듀스' 합류" [공식입장]". Naver (in Korean). OSEN. Retrieved 2 April 2016. 
5. Jeong, Yoo-jin. "다이아 채연•캐시, '프로듀스 101' 합류 하면서 잠정탈퇴…"새로운 도전"". MBN News (in Korean). Retrieved 2 April 2016. 
6. "101 girls down to 'I.O.I'". The Korea Times. 4 April 2016. 
7. "I.O.I makes official debut with 'Chrysalis' (Music video)". Kpop Herald. 4 May 2016. 
8. "Jung Chae-yeon's dual activities with Dia and I.O.I 'not problematic'". Kpop Herald. 11 May 2016. 
9. "YMC Entertainment reveals members of IOI's First Unit group". International Business Times. 10 June 2016. 
10. "I.O.I's Jung Chae-yeon to star in 'Drinking Solo'". Kpop Herald. 1 July 2016. 
11. "tvN's [Go Go with Mr. Paik] is premiering". CJ. Retrieved 15 August 2017. 
12. Park, Jung-sun. "[피플is] TV는 지금 매일매일 정채연". Joins (in Korean). JTBC PLUS, JTBC Content Hub Co., Ltd. Retrieved 27 November 2016. 
13. Hwang, Hye-jin. "정채연 대세 맞네, 1년 광고 모델료 2억원 '파격 대우'". Daum 연예 (in Korean). Newsen. Retrieved 27 November 2016. 
14. "[POP이슈]"1음방 2무대" 정채연, I.O.I 위한 이유있는 '두탕'". Herald Pop (in Korean). Herald Corporation. 19 October 2016. Retrieved 27 November 2016. 
15. "DIA's Jung Chae-yeon & Choi Tae-joon Cast In New Web Drama". KBS World Radio. KBS World Radio. Retrieved 29 December 2016. 
16. Lee, Min-ji. "다이아 정채연, 소녀와 숙녀의 경계[포토엔]". Nate (in Korean). SK Communications. Retrieved 5 January 2017. 
17. "정채연, '다시 만난 세계' 출연확정…"세부 조율 중" [공식입장 전문]". Sports Donga (in Korean). 2 June 2017. 
18. "Jung Chae-yeon stars as robot in 'I Am'". Kpop Herald. 24 July 2017. 
19. "김성령·정채연부터 김동준·JR까지, '정글' 칠레 11人 확정 [종합]". Osen (in Korean). 21 December 2017. 
20. "[SBS Star] DIA's Jung Chaeyeon, NU'EST's JR to Join 'Law of the Jungle'". SBS News. 22 December 2017. 
21. "유인혁X정채연, KBS 새 주말극 '같이 살래요' 출연 확정(공식)". Herald Corporation (in Korean). 27 December 2017. 
22. "DIA's Jung Chae-yeon to play lead role in movie with rapper SanE". Kpop Herald. 12 January 2018. 
23. "Korean-Vietnamese Co-production LIVE AGAIN, LOVE AGAIN Starring JUNG Chae-yeon Released in Vietnam". Korean Film Biz Zone. 12 February 2018. 
24. "Three New MCs Selected for SBS 'Inkigayo'!". SBS News. 13 February 2018. 
25. "세븐틴 민규·다이아 정채연·송강, '인기가요' 새 MC 확정(공식)". YTN (in Korean). 13 February 2018. 
26. "DIA's Jung Chae-yeon confirmed as lead role in upcoming drama 'To Jenny'". Kpop Herald. 12 June 2018. 
27. "Jung Chae-yeon gets first lead role". Korea JoongAng Daily. 13 June 2018. 
28. "Jung Chae-yeon to join "Battle Trip" as a special MC". Chosun News (in Korean). 25 August 2017. Retrieved 26 August 2017. 
29. "'Battle' DIA's Jung Chaeyeon is the special MC! [Battle Trip]". KBS World. 8 September 2017. Retrieved 3 June 2018. 
30. ""올해는 누구?" 2017 패셔니스타 어워즈, 더욱 뜨겁게 돌아온다". Naver (in Korean). 13 October 2017. 
31. "Kim Hee Sun & EXO win Grand Prize Awards at the 2017 Asia Artist Awards". KBS World. 16 November 2017. 
32. "[공식] 소미·청하·육성재·정채연, 2018년 이끌 브랜드 선정". Naver (in Korean). 6 November 2017.