It is said that Hazrat Ali Akbar (The oldest son of Imam Hussein (a.s.) was so similar in look and manner to Prophet Muhammad (pbuh). I wonder if there is any narration confirming this.
بسم الله الرحمن الرحیم
Hazrat Ali Akbar (a.s) was the most similar person to the Prophet (PBUH). Zakir writes in his "Tears and Tributes" as such:
It was a well-known fact amongst the Arabs throughout Hejaz that Ali Akbar was bearing a remarkable resemblance to the Holy Prophet(S.A.W.). In looks, in voice, in mannerism, in gait and in every way, he resembled the Holy Prophet(S.A.W.). The resemblance was so marked that people from far and wide were coming to see him, to be reminded of the Holy Prophet(S.A.W.) whom they were missing so much. Those who had not had the good fortune to see the Prophet were told by their elders that Ali Akbar was the very image of Muhammad(S.A.W.) (1).
> «اللهم اشهد على هؤلاء القوم فقد برز اليهم غلام اشبه الناس برسولك محمد خلقا و خلقا و منطقا و كنا اذا اشتقنا الى رؤية نبيك نظرنا اليه...»(2**
“O Allah! Bear witness against these folks that a man who looks most like Your Messenger Muhammad in his physique, manners, and eloquence has come out to fight them! Whenever we missed seeing Your Prophet, we would look at him.**
1-Zakir, Tears & Tributes, Shaheed Associates, India, 5th Revised Edition(1980).
2-Biharol Anwar, Allamah Mohammad Bagher Majlisi, Vol. 45, Page 43.