Examiner.com is reporting that Transformers 4 is expected to start principal photography "beginning late May, 2013" and as started looking for extras in the area and LA for the film. In addition, while summarizing the casting of the film, they provided the name of Mark Wahlberg's father character as Flynn Vincent joining the only other named role of Harold Attinger (Kelsey Grammer). Details on the Austin extras casting is here. Thanks to Sam and Wynton for the heads-up.