Ali Al-Akbar (peace be upon him), son of Imam Al-Hussayn (peace be upon him) and saint Layla daughter of Abi Urwah Ibn Mas'ud At-thaqafi (peace be upon her), was born on 11 Sha'ban, he possessed so much remarkable resemblance to the holy prophet Muhammad (peace and Allah's blessings be upon him and his holy family) that the Chief of Martyrs and Leader of the Youths of Paradise Imam Al-Hussayn (peace be upon him) was often heard to say “Whenever I desire to see the holy Prophet (peace and Allah's blessings be upon him and his holy family) I look at him.”
In looks, in voice, in mannerism, in gait and in every way, Ali Al-Akbar (peace be upon him) resembled the Seal of Prophets Muhammad (peace and Allah's blessings be upon him and his holy family) .
He was martyred with his father Imam Al-Hussayn (peace be upon him) in Karbala, and was buried in a tomb connected to that of his father, true Muslims from all over the world, come to perform his zyarat and pray near his holy tomb.
The historians have disagreed upon his holy age, some say he had 18 years old, sheikh Al-Mufeed wrote in his book Al-Irshad that Ali Al-Akbar (peace be upon him) has 19 years old, while others state that he had 25 years old, and that as a result of their difference on the question that he was elder of Imam As-Sajjad (peace be upon him). The most known is that he was the eldest of Imam Al-Hussayn's sons (peace be upon them).
His handsome looks were matched by his handsome deeds. He was knowns with his asceticism and worship, his nobility of character, his sense of duty, his generosity, his chivalry, his geniality, his love of justice and fair play had endeared him to every soul. He was also a brave soldier. He had been taught fencing and archery by Al-Abbas (peace be upon him).
In Karbala the day of Ashura, while sending Ali Al-Akbar to the battlefield, Imam Al-Hussayn (peace be upon him) raised his hands and said: "O Lord! Bear witness on those people for he who emerged to them is bearing a strong likeness to Your Prophet in all departments - resemblance of disposition, complexion, and logic. Hence we look at him when we crave to see Your Apostle. O Lord! Deprive them of the riches of the land, divide them, rend them asunder and turn them into smithereens. Never make the rulers be happy with them, for they sent for us so that they may support us but transgressed against us and killed us." He then recited Allah's words, "Surely, Allah chose Adam and Nuh and the descendants of Ibrahim and the descendants of Imran above the nations, offspring, one of the other, and Allah is Hearing Knowing".
On the brink of dying, he could muster a shout, "O Aba Abdillah! Farewell. Here is my grandfather; from whose cup I have drunk. Never again I will be thirsty. He says that there will be a cup waiting for you". Hussein hurried to him bending on him, putting his cheek over Ali's and murmuring, "Life is no longer worth living after your departure. How dare they encroach on Allah and violate the sanctity of the Prophet. Alas! It is hard on your grandfather and your father that you call on them for help which they cannot provide".
Then Peace be upon him the day he was born, the day he was martyred and the day he will resuscitate alive.