Russell Crowe is one of Australia's biggest stars – but when it comes to his family, he prefers to keep a low profile.Fans were delighted then when his ex-wife Danielle Spencer recently shared a photo starring the couple's two sons – Charles, 17, and 14-year-old Tennyson. WATCH: Russell Crowe's divorce auction raises more than $3 millionThe picture shows Danielle stood with her children on either side of her.