Khellven Douglas Silva Oliveira (born 25 February 2001), simply known as Khellven, is a Brazilian footballer who plays as a right-back for Palmeiras.
On 1 September 2023, Khellven signed a five-year contract with CSKA Moscow in the Russian Premier League.
On 4 August 2025, Khellven returned to Brazil and signed a five-year contract with Palmeiras.
Khellven represented Brazil U23 at the 2024 CONMEBOL Pre-Olympic Tournament, where Brazil failed to qualify for the Olympics.
Athletico Paranaense
CSKA Moscow