Feb.11 (GMM) David Coulthard's younger sister Lynsay (35) has died, British media report.
"He wanted to put on a brave face and just get the show done," said BBC commentator Coulthard's agent.
The Sun newspaper said police believe Lynsay Jackson died after a sudden unexpected illness.
A spokeswoman said: "The circumstances are not believed to be suspicious."
Lynsay had a husband and young daughter.