About a Boy (2002) - dir. Chris Weitz & Paul Weitz
An incredibly well made feel-good film about a lonely, self-involved bachelor (Hugh Grant) and a twelve-year-old dweeb (Nicholas Hoult). Throw in some zany female characters (Toni Collette & Rachel Weisz) and this little British film is a delight.
Sincere with its cheekiness, it never goes too far down any wrong path.