(Cover) - EN Showbiz - Leonardo DiCaprio and his supermodel girlfriend are reportedly still "going very strong".

The Hollywood hunk began dating blonde beauty Erin Heatherton in December last year.

The famed bachelor is said to be enjoying his romance with the American star, with insiders claiming the relationship is "going very strong".

The pair were spotted at a private party in New York City on Tuesday night looking "affectionate and cosy" with each other.

According to the New York Post, Leonardo and Erin were also seen "giving a standing ovation" for emerging guitarist Gary Clark Jr. at the star-studded affair. The bash - which was also attended by Zoe Saldana and Estelle - was put on by Warner Bros. executives Lyor Cohen and Todd Moscowitz at The Darby restaurant.

Leonardo was certainly enjoying the festivities and was seen "taking a photo with a fan" before giving fellow party-goer Pharrell Williams a "huge hug".

Spokespeople for Leonardo and Erin had no comment on the state of their relationship.

Leonardo has dated a string of beautiful women including Gisele Bndchen, Bar Refaeli and Blake Lively. (C) Cover Media