He is a member of the South Korean boy band Astro, and he debuted as a solo artist with the extended play (EP) Entity on February 15, 2024.

[4] He debuted as an actor in 2014 with a minor role in the film My Brilliant Life, starring Gang Dong-won and Song Hye-kyo.

[27] In December, he was announced as a cast member of the new variety show Handsome Tigers alongside Joy, Lee Sang-yoon, Yoo Seon-ho, and Seo Jang-hoon.

[30] In December 2020, he starred in the tvN coming-of-age romance drama True Beauty based on the webtoon of the same name, playing a high school student alongside Moon Ga-young.

[33] In November 2021, Cha released "Don't Cry, My Love", a ballad song featuring a piano performance, for the official soundtrack of the comic Under The Oak Tree.

[35] He then played the role of a Navy officer in Hwang In-ho's urban terror action film Decibel which was released in November 2022.

[36] Later that year he starred in TVING drama Island alongside Kim Nam-gil, Lee Da-hee and Sung Joon, playing the role of an exorcist priest.

[39] On June 1, Cha was confirmed for Wonderful World led by veteran actress Kim Nam-joo with premiere scheduled for the first half of 2024.

[40] On October 18, Cha released the remake of "Jealousy", which was originally sung by Yoo Seung-beom, for the official soundtrack of the drama A Good Day to Be a Dog.

[47] His Just One 10 Minutes fan concert began on February 17 in South Korea, including tours to Malaysia, Thailand, Philippines, Japan, Singapore, as well as Indonesia.

Cha is scheduled to reunite with the audience in South Korea at SK Olympic Handball Gymnasium on July 6.

[55] On November 1, Cha was cast in the Netflix superpower comedy series The Wonderfools alongside Park Eun-bin, in which he plays a socially awkward civic servant from Seoul.

[56] On November 26, it was announced that Cha would be featured on Lee Seung Gi's 20th debut anniversary album With, in the song "Because You're My Woman", set to be released on December 4.

[60] In April, he was selected as promotional model for Clearteen, a dermatological line from the South Korean pharmaceutical company Handok.

[65] In January 2018, Cha was selected as the model for Aritaum's Angel Kiss Tint, from the South Korean beauty and cosmetics brand Amorepacific.

[66] In July, Cha was chosen as new TV commercial model for "EyeBon", an eye care product line by Dong-A Pharmaceutical.

[101] In February, Cha and actress Han So-hee were selected as CF models together for global clothing brand Giordano.

[105] In May, Cha has been appointed as honorary ambassador for the '2023–2024 Visit Korea Year', participated in the launching ceremony of the 'K-Tourism Cooperation Group' along with First Lady Kim Keon-hee and Chairperson Lee Boo-jin.

[130] In June 2018, Cha participated in the Ice Bucket Challenge to raise awareness and funds for Korea's first ALS nursing hospital.

[133] In January 2020, Cha collaborated in G-Market Global Shop's "Give Love" campaign where all proceeds were donated to Save the Children Korea's "School Me" project.

[136] In November, it was announced that Cha will hold a photo exhibition at the end of the year and will donate all profits to help the underprivileged.

[137] In April 2023, Cha donated a hat for an auction, with the proceeds going to the "Little Miracle" project in Thailand, which supports the care of critically ill children, raising a total of ฿400,000.

[140] In October 2024, Cha participated in the "Love Your W" breast cancer awareness campaign and the charity event organized by W Korea.

[141][142] He also donated his personal items to "WeAJa Sharing Market 2024", South Korea's largest charity event, with all proceeds going to support underprivileged children and youth, as well as vulnerable groups affected by the climate crisis.

[153] In April 2024, Cha placed 11th on Forbes Korea Power Celebrity, being the highest-ranked actor on the list, and fourth in the SNS category.

[154] In June 2024, Cha ranked third in Gallup Korea's Favorite Actor in Last Decade (2004–2024), tying with veteran actress Kim Nam-joo.

[155] In August 2024, Cha ranked first in Gallup Korea's "StarNews 20th Anniversary" survey as the Most Anticipated Next-Generation Actor.

[156] In September 2024, he ranked second in Gallup Korea's "StarNews 20th Anniversary" survey as the Most Anticipated Idol-Actor on the Big Screen, and he is the youngest artist on the list.

[157] In November 2024, Cha was chosen as one of the "30 Most Inspiring People" in celebration of the 30th anniversary of Elle Thailand,[158] and South Korean poet Jang Jae-seon, a senior journalist at the Munhwa Ilbo, selected him as one of the 37 icons of popular culture who provide comfort and inspiration to be featured in the poetry collection "The Comfort of the Stars".