Back in 2009, 851 Londoners played the ukulele in unison, setting a world record.

Now, Strathmore is out to shatter that record with tonight's Ukefest, and they'll need your help to get into the Guinness Book of World Records.

Starting at 6 p.m., you can register for the event and brush up on your uke skills. Then, at 7:30 p.m., the festival starts, and a host of musicians will perform ukulele tunes to which you can strum along.

If you don't have a uke of your own, you can buy one at the concert, and if you're less than confident in your strumming skills, Marcy Maxer, of Grammy-winning local duo Cathy and Marcy, will show you the ropes in this video.

Parking will be available at Strathmore and at the Grosvenor-Strathmore Metro Station lot.