Meet Christine Janes, Britain's happiest person
1 April 2011 Last updated at 10:14 BST
Government researchers will begin questioning people across Britain about how satisfied they are with their lives.
They will be asked a series of questions to rate their happiness on a scale of 0 to 10.
It is hoped the results will provide key information for policymakers and businesses.
The ex-tennis star Christine Janes - formerly Christine Truman - has been judged, using a formula, by a behavourial expert as the happiest person in Britain.
She put her happiness down to family, where you live and having a bit of luck.