People inside a Wordsquare

Hold on, it's not a riddle! This time, you must fill in a 4×4 Wordsquare. Sounds easy, right? But now, they are not English words. They're names!

1. Mia + Bareilles + Gilbert + Arjun
2. Cummings + Walker + Rickman + Alda
3. Brooks + al'Thor + Danny + Wilson
4. Garcia + Whitfield + Dick + Serkis

16 names for 16 squares. Fair enough, isn't it? But, as the rules of Wordsquares say, fill each square with one letter only. But how? Figure it out yourself!

• This is a 30-second Google solve (or fewer if you already know some). I would suggest not using as many examples and/or not stating outright that we need names. In the future, try introducing some additional complexity -- one way is with obfuscation -- perhaps writing a line of text for each row and hiding the names within? – feelinferrety Jul 7 '17 at 15:31
• @feelinferrety Oops, I never realized that it can be googled. I will certainly make harder puzzles next time. Thanks for the suggestions! – William Nathanael Jul 7 '17 at 15:34

The wordsquare:

S A R A
A L A N
R A N D
A N D Y

The first or second names of quite famous real or fictional characters.

Sara Mia, Sara Bareilles, Sara Gilbert, Sara Arjun
Alan Cummings, Alan Walker, Alan Rickman, Alan Alda
Rand Brooks, Rand al'Thor, Danny Rand, Rand Wilson
Andy Garcia, Andy Whitfield, Andy Dick, Andy Serkis