Academy award-winning actor Robert De Niro attended the funeral of his 19-year-old grandson who died after taking fentanyl-laced pills. The ‘Goodfella’s actor, 79, was joined by his longtime friends Christopher Walken, 80, Harvey Keitel, 84, and music executive Tommy Mottola, as he attended the funeral of grandson Leandro De Niro in New York, Mirror.co.uk reported. De Niro’s girlfriend Tiffany Chen was also in attendance with their baby daughter Gia bundled close in a carrier. Leandro died last week after taking fentanyl-laced pills at his $1million Wall Street apartment. At the time his grandfather Robert De Niro said he was “deeply distressed” at the news. The teenager was found sitting in a chair beside white powder in his one-bedroom apartment on Sunday. His mother Drena, adopted by De Niro after he married her mother Diahnne Abbott in 1976, announced his death on Monday.