Shia LaBeouf made an undercover entrance and speedy exit at the premiere of his new film, “The Company You Keep.” The actor, who’s been in a public feud with Alec Baldwin, who he implied had him fired from the Broadway show “Orphans,” avoided the press line at Monday’s Peggy Siegal Co. screening at MoMA, arriving after the cast had been introduced. After the lights were dimmed and the movie started, director Robert Redford got back on the mike to announce LaBeouf was also in the audience, causing one guest to remark, “It’s just not his month.” LaBeouf, wearing a foot cast, and girlfriend Mia Goth hit the Avión Espresso bash at Harlow, staying just 10 minutes.