Kaki Sham Ka-ki (Chinese: 岑珈其; born 1990) is a Hong Kong actor and a founding member of the sketch comedy YouTube channel Trial & Error.

[5][8] At 18, Sham directed a short film Hope at Mak's suggestion, documenting the daily routines of him and his family after his Form 5 graduation,[9] which won the Gold Prize in the 14th ifva Awards.

[10] In 2012, Sham joined Mak's newly founded talent agency Dumb Youth,[11] and began taking minor roles in RTHK television series and student film projects.

[10] In 2013, he starred in a lead role as Char Siu in the segment "Hide and Seek" of the horror film Tales of the Dark 2, directed by Lawrence Ah Mon,[12] and appeared in Mak's 2014 romantic comedy Uncertain Relationship Society [zh].

[13] He received his breakout role as Chen Keung, a talkative member of the protagonist baseball team, in the sports drama film Weeds on Fire,[6] which brought him public recognition.

[20] He also portrayed younger versions of Eric Kot and Jordan Chan in Tracey and Golden Job respectively,[21] and starred in the web series Hong Kong West Side Stories [zh] and Demon's Path [zh-yue].

[26] He also portrayed Kevin, an autistic youth who serves as a plot device to break the fourth wall, in The Gutter (TV series) [zh],[27] a role that director-screenwriter Norris Wong tailored specifically for him.