Sara Ali Khan is clearly having a gala time at home while being quarantined. We all saw her throwback video where she could be seen dancing her heart out. And now, it's time to laugh a little. Her latest Instagram video is with her brother Ibrahim Ali Khan and it involves a classic Knock Knock joke.

Taking to her Instagram account, she wrote- "Throwback to when you could... this was followed by a string of emojis. And continuing, she wrote- "But for now stay home stay safe and don't go knocking." (sic)