I'm beside myself with joy.

Meaning

I'm overwhelmed with happiness.

Examples

• John: 'My daughter just graduated from university.'
• Alice: 'Congratulations! I'm <b>beside myself with joy</b> for you and your family.'
• John: 'That's amazing! You must be <b>beside yourself with joy</b>.'
• Alice: 'I won first prize in the photography contest.'