Arnold Schwarzenegger's Love Child Joseph Baena Misses the Wedding of Half-Sister Katherine and Chris Pratt

Joseph Baena, 21, was not among the guests in his half-sister, Katherine Schwarzenegger’s lavish wedding with Chris Pratt this weekend. Instead, he spent the afternoon sweating it off at the gym.

Arnold Schwarzenegger’s daughter, Katherine Schwarzenegger, just tied the knot with actor Chris Pratt over the weekend, but absent from their star-studded guest list was her half-brother Joseph Baena.

Baena, who was the result of Schwarzenegger’s illicit affair, hit the gym while his half-sister walked down the aisle. He appeared on his friend, Thomas A.C. Kocer’s, Instagram story doing an intense workout in his school, Pepperdine University.

Although his relationship with his half-siblings is not talked about, actions show of Katherine’s disapproval. While he follows her and his half-brother Patrick on their Instagram accounts, neither of the two follow Baena back.

In April, Katherine sparked controversy after sharing a “National Siblings Day” post which excluded Baena. The 29-year-old captioned her photo: “I love them so much #nationalsiblingsday,” alongside two throwback photos with her sister Christina, 27, and brothers Patrick, 25, and Christopher, 21.

After being called out by a critic, Katherine calmly responded by reminding the commenter of “God’s presence in all of our lives.” She said:

"He does not judge you or any of us. I am praying for you and sending you love not because what you said is okay, but because I believe you need love to heal whatever is causing you to post comments like this. god bless you!"

Baena is Schwarzenegger’s son with their longtime maid, Mildred, in his LA home with his wife, Maria Shriver, and four children. Upon learning about her husband’s affair, Shriver filed for divorce, yet the two have remained civil, especially during family matters.

The gym guru turned action star initially didn’t know of his illegitimate child with Mildred until she told him years later. The father and son shortly developed an inseparable bond which does not come as a surprise after Baena shows similarities with his father.