lo and behold
US /loʊ ənd bɪˈhoʊld/
UK /loʊ ənd bɪˈhoʊld/
1.
used to present a new and surprising event, often a sudden appearance
:
•
We searched everywhere for the lost cat, and lo and behold, she was sleeping on the couch the whole time!
•
He opened the old chest, and lo and behold, it was full of antique coins.