Billy Zane's Wig and a 'Friday Night Lights' Reunion: Top 10 Instagram Photos of the Week

Justin Timberlake unveils the first photo of son Silas and 'Friday Night Light's' Tim McGraw and Brian Grazer reunite in some of this week's best celebrity Instagram posts.

Casting announcements are made and stars gather for the TIME 100 gala in this week's best-of-Instagram roundup.

See how Anna Kendrick, Kanye West and other celebrities spent their week in these photo highlights:

Justin Timberlake turns newborn son Silas Randall Timberlake into a Memphis Grizzlies fan.


The Timberlakes are ready!!! GO GRIZZ! #GritNGrind #Playoffs #BabyGrizzROAR

A photo posted by Justin Timberlake (@justintimberlake) on

Anna Kendrick and the Barden Bellas tease Pitch Perfect 2.


Backstreet's Back

A photo posted by Anna Kendrick (@annakendrick47) on

Tim McGraw and Brian Grazer have a mini Friday Night Lights reunion at the TIME 100 gala.


#FridayNightLights reunion with producer @briangrazer #TIME100

A photo posted by Tim McGraw (@thetimmcgraw) on

Kanye West dines with Ralph Lauren.


Dinner at the Polo Bar with @RalphLauren

A photo posted by Kim Kardashian West (@kimkardashian) on

The Franco brothers celebrate James Franco's birthday.


Francoshiz Birthdayshiz Was a nice night with FAM and friends

A photo posted by James Franco (@jamesfrancotv) on

A blonde Billy Zane channels Hansel in Ben Stiller's casting announcement for Zoolander 2.


Hansel has some #Zoolander2 news about @billyzane

A video posted by Ben Stiller (@benstiller) on

Beth Behrs invades the Dallas Cowboys locker room backstage at the ACM Awards.

Robert Downey Jr. and Chris Evans gear up for the Avengers: Age of Ultron press tour.


One last croon before the WAR ... #avengers #ageofultron #presstour #marvel #captainamerica

A photo posted by Robert Downey, Jr. (@robertdowneyjr) on

Emma Roberts, Ariana Grande and Skyler Samuels snap a photo on the set of Scream Queens.


These ladies... @arianagrande @emmaroberts @screamqueensfox #ScreamQueens

A photo posted by Skyler Samuels (@skylersamuels) on

Furious 7 co-stars Ludacris and Tyrese Gibson get silly backstage.


Roman Pierce always eatin! Get the fuck out my room! #nowthatsludicrous

A photo posted by @ludacris on