Malik Mohammad Jayasi's poem of 1540, “Padmavat”, mentions a queen called Rani Padmavati. However, it is not known if this queen was real or not.
It is true that, in 1303, Allaudin Khilji did attack Chittorgarh, which was then under the control of Ratan Singh. While historians disagree on the specifics, the attack is thought to have nothing to do with Rani Padmavati or her beauty. Instead, Allaudin Khilji initiated the attack on Chittorgarh to extend his control over India.