Accounts of the Mozart children at play recall accounts of the infant Bront? Wolfgang's elder sister Nannerl told of the day when - for lack of anything better to do - the eight-year-old composer began to write his first symphony, and asked her to remind him 'to give the horn something worthwhile to do". As Leonidas Kavakos and the Camerata Salzburg demonstrated in their late-night Prom, she did just that, as the second movement gives the horn a starring role in the dreamy miasma the orchestra sets up. This 12-minute work is not in itself evidence of overpowering genius - Mozart was less of a prodigy than is sometimes claimed - but it reveals a remarkably assured control of orchestral effects. It shows no startling originality in the development of its ideas, but it could pass as a mature work by one of the adult composers working then in Salzburg. Full marks to Nicholas Kenyon for according it a Proms premiere. But the pi? de r?stance was Mozart's Third Violin Concerto, written when he was 19 and his genius was bursting into full flower. Kavakos's trademark is clean phrasing and an exceptionally pure tone.

Leading with his violin, he came across less as a star-plus-backing than as primus inter pares, the inspirational leader of the pack.His first-movement cadenza was discreetly dazzling. In the unfurling of the Adagio - which Alfred Einstein famously said seemed "to have fallen straight from heaven" - Kavakos brought things to a sublime stasis, which his cadenza reinforced with a graceful rumination on all that had gone before. There was no self-promotion in the musical personality he projected, and modesty was the impression left behind.Haydn's Symphony No 82 is nicknamed "The Bear" thanks to the organ-grinder's drone - on a variety of instruments - that permeates the final movement. It shows Haydn at his most mercurial and inventive, and under Kavakos's direction this small ensemble, with their warm, sympathetic sound, did it proud.BBC Proms to 9 September (020-7589 8212; www.bbc.co.uk/proms). Vincent Chase is the hottest actor in Hollywood. He's Leonardo DiCaprio with added height, Brad Pitt without the love problems, Tom Cruise without the issues.

He has a blockbuster film directed by James Cameron due out any day now and free access to Hollywood's hippest bars and coolest clubs. If you had to create a movie star from a blender, then the laid-back Vince Chase, admired by men and adored by women, is what you'd come up with There's only one problem: he doesn't actually exist. Welcome to the world of Entourage, America's hottest comedy, a show that has gone from cult viewing to commercial hit in the time it takes Harvey Weinstein to greenlight a project and which arrives in Britain on ITV2 this Sunday. Based on the early Hollywood career of actor Mark Wahlberg, Entourage centres around the exploits of Vince, a young actor living the life of a Hollywood player with his three friends from Queens, New York: the responsible Eric (known as E), who works as his manager; the dope-smoking, hip-hop-adoring Turtle, who is his driver; and Johnny Drama, Vince's half-brother, a failed actor. Meanwhile Vince's agent, Ari Gold (scene-stealing Jeremy Piven), is desperate to ensure that his client goes from stardom to superstardom as soon as possible.The show is filled with knowing movie references (when Vince hits the big time with the launch of Aquaman the episode references Cameron Crowe's Almost Famous; when E meets faded Seventies producer Bob Ryan the scenes were shot at Seventies producer Robert Evans's house)."Entourage works because it's about male friendship," says Doug Ellin, the show's writer and director (Wahlberg has an executive producer's credit). "The Hollywood setting is entertaining but it's really about the relationship between these guys.