It was a lonesome Father's Day for Arnold Schwarzenegger.
The embattled former California governor had lunch with his 13-year-old son Christopher at Marmalade Cafe in Malibu, but the rest of his children--Patrick, Katherine, and Christina--were absent.
Patrick, who is vacationing with friends in Greece, gave his Dad a twitter shout out instead.
"#happyfathersday to all the dads out there! Shout out to my dad and the best father i could ever ask for. Love you so much always!" he tweeted.
Schwarzenegger's estranged wife Maria Shriver--also absent from the Father's Day festivities--spent the weekend shopping for antiques and attending a U2 concert in Anaheim, during which Bono serenaded her.
"For Maria Shriver who's here tonight," he said before singing "Pride (In The Name Of Love)."