Sallam Alykum,

As a 21 year old brother, a beard is required in Islam. Though it doesn’t need to be long at all, I’m trying to grow mine out as long as possible lol. I think it will look pretty cool if kept well groomed ^_^

Allamah Majlisi (May Allah have mercy on his soul) quotes in a narration, in Vol. 16 of his book Bihar Al-Anwar (Seas of Illuminations) on the authority of Ibn Masud in which the Holy Prophet of Islam Muhammad (saww) states: 

“When Allah, the Blessed, the Merciful, accepted the repentance of Adam (saww), Gabriel (AS) came to Adam (saww) & said,

“May Allah grant you a (long) life & bestow beauty upon you”

Adam (saww) then said,

“I understand what you mean by long life, however, I do not understand what you mean by beauty”

[Thus, in thanking Allah, his Lord & Master] he went into prostration & when he raised his head from it, he made a supplication & said,

“O, Allah, Increase in me the beauty [that you have promised me]”,

soon after he had made the supplication a beautiful beard appeared on his radiant face. When Gabriel (AS) witnessed what had happened, he touched the beard of prophet Adam (saww) & said,

“This is in response to the supplication you made to your Lord, & it has been granted to you & your male offspring till the day of reckoning”.

- http://www.islamic-laws.com/beard.htm

So how many brothers here are growing out a beard =] ?